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300b amplifier

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Home / Guitar Amplifiers / 300b amplifier refurbished & used for sale | For Sale USA
Space tech laboratory - space-tech,

Space tech laboratory - space-tech,

$2950.00
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Assembled spartan tube - f1, amp

Assembled spartan tube - f1, amp

$478.02
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Oilily 300b vacuum tube - oilily,

Oilily 300b vacuum tube - oilily,

$1111.11
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300b stereo vacuum tube - 300b,

300b stereo vacuum tube - 300b,

$861.45
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Western electric ret 179a - western,

Western electric ret 179a - western,

$750.00
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Reisong 300b tube amplifier - 300b,

Reisong 300b tube amplifier - 300b,

$680.00
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300b mono tube amplifier diy - 300b,

300b mono tube amplifier diy - 300b,

$230.00
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300b tube amplifier - 300b, diy

300b tube amplifier - 300b, diy

$380.00
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Sun audio 300be - 100v, 300b

Sun audio 300be - 100v, 300b

$2700.00
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Dennis had inspire - dennis,

Dennis had inspire - dennis,

$3299.00
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Advance stella vacuum - advance,

Advance stella vacuum - advance,

$998.99
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One matched pair high ended - matched,

One matched pair high ended - matched,

$221.55
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One pair 300b monoblock vacuum - monoblock,

One pair 300b monoblock vacuum - monoblock,

$820.00
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Oilily a300bmk vacuum - oilily,

Oilily a300bmk vacuum - oilily,

$1299.00
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Takatsuki 300b vacuum - takatsuki, ta−300b

Takatsuki 300b vacuum - takatsuki, ta−300b

$1591.99
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One matched pair linlai - one,

One matched pair linlai - one,

$214.18
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300b single stereo tube - 300b,

300b single stereo tube - 300b,

$1318.99
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Transcendent sound the - transcendent,

Transcendent sound the - transcendent,

$1000.00
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Hifi 300b vacuum tube power - 300b,

Hifi 300b vacuum tube power - 300b,

$36.00
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Triode 300bd 300b tube - vp-300bd,

Triode 300bd 300b tube - vp-300bd,

$1358.00
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Triode trk 300 - 300b, vacuum

Triode trk 300 - 300b, vacuum

$1011.02
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Elekit 8900 single - elekit,

Elekit 8900 single - elekit,

$1059.99
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Psvane horizon series - series, 300b-at

Psvane horizon series - series, 300b-at

$199.99
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1pc class single - 1pc, a

1pc class single - 1pc, a

$522.00
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Triode trv a300xr - triode, we300b

Triode trv a300xr - triode, we300b

$2739.99
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Lab 300b vacuum tube - ka,

Lab 300b vacuum tube - ka,

$3435.00
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Pair western electric 91a - pair,

Pair western electric 91a - pair,

$768.00
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Willsenton 800i single - r-800i, ended

Willsenton 800i single - r-800i, ended

$3026.88
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Edcor xpwr149 800v - xpwr149,

Edcor xpwr149 800v - xpwr149,

$265.00
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Spartan small 300b tube amp - spartan,

Spartan small 300b tube amp - spartan,

$479.00
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Hifi 300b vacuum tube - pc,

Hifi 300b vacuum tube - pc,

$470.00
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Parallel tube 300b - parallel,

Parallel tube 300b - parallel,

$234.60
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300b tube amplifier - diy, kit

300b tube amplifier - diy, kit

$199.99
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One pair class hifi - a, power

One pair class hifi - a, power

$779.00
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Allnic 1500 set - ii,

Allnic 1500 set - ii,

$7999.00
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Otomon lab 300b tube - lab,

Otomon lab 300b tube - lab,

$3500.00
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300b singled ended amplifier - ended,

300b singled ended amplifier - ended,

$3499.00
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Minava 300b tube - minava, amplifier

Minava 300b tube - minava, amplifier

$853.10
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Diy 300b tube pure - tube,

Diy 300b tube pure - tube,

$32.00
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1pc 300b - 1pc, shuguang

1pc 300b - 1pc, shuguang

$95.95
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Oldchen stereo tube - oldchen,

Oldchen stereo tube - oldchen,

$819.21
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1pc 300b single ended - 1pc,

1pc 300b single ended - 1pc,

$46.43
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Stereo 300b vacuum tube power - stereo,

Stereo 300b vacuum tube power - stereo,

$199.99
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For minava 300b - for, se-300b

For minava 300b - for, se-300b

$871.00
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Assembled hifi 300b - hifi,

Assembled hifi 300b - hifi,

$75.94
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300b tube amplifier - amplifier, no

300b tube amplifier - amplifier, no

$3500.00
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1pc hifi class single ended - class, a

1pc hifi class single ended - class, a

$522.00
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R800i 300b 845 - 845, class

R800i 300b 845 - 845, class

$3755.99
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Hifi 300b vacuum tube - 300b,

Hifi 300b vacuum tube - 300b,

$72.10
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Line magnetic 805ia tube - line, lm-805ia

Line magnetic 805ia tube - line, lm-805ia

$3299.00
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San tango 300b - 300b, with

San tango 300b - 300b, with

$2880.00
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Hifi 300b vacuum tube - hifi,

Hifi 300b vacuum tube - hifi,

$429.40
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Single end class 6f3 - class, 6f3+300b

Single end class 6f3 - class, 6f3+300b

$819.00
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Oldchen stereo tube - stereo,

Oldchen stereo tube - stereo,

$830.30
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Sophia electric 274b - electric,

Sophia electric 274b - electric,

$229.00
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Magnequest 030 output - magnequest,

Magnequest 030 output - magnequest,

$750.00
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Minava 300b single - minava, se-300b

Minava 300b single - minava, se-300b

$922.08
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Willsenton r300 plus 8w - willsenton,

Willsenton r300 plus 8w - willsenton,

$1569.40
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1pc class single ended - 1pc, hi-fi

1pc class single ended - 1pc, hi-fi

$708.80
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Custom 300b single ended - custom, single-ended

Custom 300b single ended - custom, single-ended

$4799.00
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Willsenton 800i single ended - willsenton,

Willsenton 800i single ended - willsenton,

$3027.84
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Hifi 300b vacuum tube - vacuum,

Hifi 300b vacuum tube - vacuum,

$79.94
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Line magnetic tube amplifier - magnetic,

Line magnetic tube amplifier - magnetic,

$3999.00
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Welborne labs laurel - welborne,

Welborne labs laurel - welborne,

$44.99
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Sophia electric 300b - sophia, 91-01

Sophia electric 300b - sophia, 91-01

$2950.00
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Audio enclosure chassis diy - gp-audio,

Audio enclosure chassis diy - gp-audio,

$149.99
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Quicksilver 300b set mono - quicksilver,

Quicksilver 300b set mono - quicksilver,

$5700.00
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Manley labs neo classic - se, /

Manley labs neo classic - se, /

$6361.29
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Tube preamplifier amplifier - 22,

Tube preamplifier amplifier - 22,

$110.00
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Western electric 300b vacuum - western,

Western electric 300b vacuum - western,

$242.66
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Takatsuki 300b vacuum - takatsuki, ta−300b

Takatsuki 300b vacuum - takatsuki, ta−300b

$1968.19
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Muzishare r100 amplifier 300b - r100,

Muzishare r100 amplifier 300b - r100,

$2725.00
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Audio tekne we300b 8403p - we300b, tm-8403p

Audio tekne we300b 8403p - we300b, tm-8403p

$9999.88
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Vintage nos panasonic 300b - vintage,

Vintage nos panasonic 300b - vintage,

$110.00
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New box matching - matching, pair

New box matching - matching, pair

$1600.00
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300b stereo tube singled - 300b,

300b stereo tube singled - 300b,

$3200.00
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Set 300b vacuum - set,

Set 300b vacuum - set,

$455.00
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Elekit power amplifier vacuum - amplifier,

Elekit power amplifier vacuum - amplifier,

$1058.00
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Parallel tube 300b - parallel,

Parallel tube 300b - parallel,

$240.12
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Waiting audio 300b - audio, tube

Waiting audio 300b - audio, tube

$2980.00
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Manley neo classic 300b - manley,

Manley neo classic 300b - manley,

$5195.00
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Sansui outpt transformers - 2,

Sansui outpt transformers - 2,

$399.00
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Sanborn 126 126b 64 300a - hp/sanborn, 126b,

Sanborn 126 126b 64 300a - hp/sanborn, 126b,

$12.33
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Reisong a50 mkiii 300b hifi - mkiii,

Reisong a50 mkiii 300b hifi - mkiii,

$1899.00
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Grade sophia electric - sophia, blue

Grade sophia electric - sophia, blue

$229.99
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Sun audio 300be - audio, single

Sun audio 300be - audio, single

$3000.00
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Single ended tube - single-ended,

Single ended tube - single-ended,

$862.60
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One matched pair linlai audio - matched,

One matched pair linlai audio - matched,

$216.41
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Inland controls model - controls,

Inland controls model - controls,

$300.00
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Otomon lab 71a - otomon, 300b

Otomon lab 71a - otomon, 300b

$5800.00
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Magical 2026 new sophia - magical,

Magical 2026 new sophia - magical,

$1599.99
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Otomon lab 300b - 300b, drive

Otomon lab 300b - 300b, drive

$7500.00
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300b437 onan amplifier assy - amplifier,

300b437 onan amplifier assy - amplifier,

$69.95
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Canary audio reference 300b - audio, 2

Canary audio reference 300b - audio, 2

$24.95
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Matched pair linlai 300b g - matched,

Matched pair linlai 300b g - matched,

$119.04
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Tango 10836 power - power, transformer

Tango 10836 power - power, transformer

$226.58
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📊96 listings · from $12.33 · avg $1614.82

Browse 96 300b amplifier listings currently in our index. Prices range from $12.33 to $9999.88, with an average of $1614.82. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about 300b amplifier →

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Whether you are looking for a brand-new or second-hand 300b amplifier, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $12.33, while premium listings can reach $9999.88 — giving you a wide budget spread to work with. The average price of $1614.82 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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