For Sale USA

300b amplifier

4

300b amplifier for sale on largest auction and classifieds sites

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

Space tech laboratory - space-tech,

$2950.00
Buy It Now

» View on eBay #sponsored
Assembled spartan tube amp - spartan,

Assembled spartan tube amp - spartan,

$478.02
Buy It Now

» View on eBay #sponsored
Oilily 300b vacuum - 300b-mk,

Oilily 300b vacuum - 300b-mk,

$1111.11
Buy It Now

» View on eBay #sponsored
300b stereo vacuum - , tube

300b stereo vacuum - , tube

$861.45
Buy It Now

» View on eBay #sponsored
Western electric ret 179a - electric,

Western electric ret 179a - electric,

$750.00
Buy It Now

» View on eBay #sponsored
Reisong 300b tube amplifier - 300b,

Reisong 300b tube amplifier - 300b,

$680.00
Buy It Now

» View on eBay #sponsored
300b mono tube amplifier diy - tube,

300b mono tube amplifier diy - tube,

$230.00
Buy It Now

» View on eBay #sponsored
300b tube amplifier diy kit - 300b,

300b tube amplifier diy kit - 300b,

$380.00
Buy It Now

» View on eBay #sponsored
Sun audio 300be - sun, 300b

Sun audio 300be - sun, 300b

$2700.00
Buy It Now

» View on eBay #sponsored
Dennis had inspire - had, 300b

Dennis had inspire - had, 300b

$3299.00
Buy It Now

» View on eBay #sponsored
Advance stella vacuum - stella,

Advance stella vacuum - stella,

$998.99
Buy It Now

» View on eBay #sponsored
One matched pair high ended - pair,

One matched pair high ended - pair,

$221.55
Buy It Now

» View on eBay #sponsored
One pair 300b monoblock - 300b, vacuum

One pair 300b monoblock - 300b, vacuum

$820.00
Buy It Now

» View on eBay #sponsored
Oilily a300bmk vacuum tube - oilily,

Oilily a300bmk vacuum tube - oilily,

$1299.00
Buy It Now

» View on eBay #sponsored
Takatsuki 300b vacuum - takatsuki, ta−300b

Takatsuki 300b vacuum - takatsuki, ta−300b

$1591.99
Buy It Now

» View on eBay #sponsored
One matched pair linlai audio - one,

One matched pair linlai audio - one,

$214.18
Buy It Now

» View on eBay #sponsored
300b single stereo tube - single,

300b single stereo tube - single,

$1318.99
Buy It Now

» View on eBay #sponsored
Transcendent sound the - transcendent,

Transcendent sound the - transcendent,

$1000.00
Buy It Now

» View on eBay #sponsored
Hifi 300b vacuum - hifi, tube

Hifi 300b vacuum - hifi, tube

$36.00
Buy It Now

» View on eBay #sponsored
Triode 300bd 300b tube - vp-300bd,

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

$1358.00
Buy It Now

» View on eBay #sponsored
Triode trk 300 - 300b, vacuum

Triode trk 300 - 300b, vacuum

$1011.02
Buy It Now

» View on eBay #sponsored
Elekit 8900 single - elekit,

Elekit 8900 single - elekit,

$1059.99
Buy It Now

» View on eBay #sponsored
Psvane horizon series 300b - psvane,

Psvane horizon series 300b - psvane,

$199.99
Buy It Now

» View on eBay #sponsored
1pc class single ended - 1pc, hi-fi

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

$522.00
Buy It Now

» View on eBay #sponsored
Triode trv a300xr we300b - triode, trv-a300xr

Triode trv a300xr we300b - triode, trv-a300xr

$2739.99
Buy It Now

» View on eBay #sponsored
Lab 300b vacuum tube - 300b,

Lab 300b vacuum tube - 300b,

$3435.00
Buy It Now

» View on eBay #sponsored
Pair western electric 91a - electric,

Pair western electric 91a - electric,

$768.00
Buy It Now

» View on eBay #sponsored
Willsenton 800i single ended - willsenton,

Willsenton 800i single ended - willsenton,

$3026.88
Buy It Now

» View on eBay #sponsored
Edcor xpwr149 800v - edcor, (400-0-400)

Edcor xpwr149 800v - edcor, (400-0-400)

$265.00
Buy It Now

» View on eBay #sponsored
Spartan small 300b - spartan, amp

Spartan small 300b - spartan, amp

$479.00
Buy It Now

» View on eBay #sponsored
Hifi 300b vacuum - 300b, tube

Hifi 300b vacuum - 300b, tube

$470.00
Buy It Now

» View on eBay #sponsored
Parallel tube 300b - an,

Parallel tube 300b - an,

$234.60
Buy It Now

» View on eBay #sponsored
300b tube amplifier diy - diy, kit

300b tube amplifier diy - diy, kit

$199.99
Buy It Now

» View on eBay #sponsored
One pair class hifi - class,

One pair class hifi - class,

$779.00
Buy It Now

» View on eBay #sponsored
Allnic 1500 set 300b - mk,

Allnic 1500 set 300b - mk,

$7999.00
Buy It Now

» View on eBay #sponsored
Otomon lab 300b tube - 300b, se

Otomon lab 300b tube - 300b, se

$3500.00
Buy It Now

» View on eBay #sponsored
300b singled ended amplifier - singled,

300b singled ended amplifier - singled,

$3499.00
Buy It Now

» View on eBay #sponsored
Minava 300b tube amplifier - tube,

Minava 300b tube amplifier - tube,

$853.10
Buy It Now

» View on eBay #sponsored
Diy 300b tube pure - tube, power

Diy 300b tube pure - tube, power

$32.00
Buy It Now

» View on eBay #sponsored
1pc 300b shuguang - 1pc,

1pc 300b shuguang - 1pc,

$95.95
Buy It Now

» View on eBay #sponsored
Oldchen stereo tube - stereo,

Oldchen stereo tube - stereo,

$819.21
Buy It Now

» View on eBay #sponsored
1pc 300b single ended - 1pc,

1pc 300b single ended - 1pc,

$46.43
Buy It Now

» View on eBay #sponsored
Stereo 300b vacuum tube power - 300b,

Stereo 300b vacuum tube power - 300b,

$199.99
Buy It Now

» View on eBay #sponsored
For minava 300b - for, se-300b

For minava 300b - for, se-300b

$871.00
Buy It Now

» View on eBay #sponsored
Assembled hifi 300b vacuum - hifi,

Assembled hifi 300b vacuum - hifi,

$75.94
Buy It Now

» View on eBay #sponsored
300b tube amplifier no - se,

300b tube amplifier no - se,

$3500.00
Buy It Now

» View on eBay #sponsored
1pc hifi class single ended - 1pc, a

1pc hifi class single ended - 1pc, a

$522.00
Buy It Now

» View on eBay #sponsored
R800i 300b 845 class - r800i,

R800i 300b 845 class - r800i,

$3755.99
Buy It Now

» View on eBay #sponsored
Hifi 300b vacuum tube power - vacuum,

Hifi 300b vacuum tube power - vacuum,

$72.10
Buy It Now

» View on eBay #sponsored
Line magnetic 805ia tube - magnetic,

Line magnetic 805ia tube - magnetic,

$3299.00
Buy It Now

» View on eBay #sponsored
San tango 300b - san-ei, tube

San tango 300b - san-ei, tube

$2880.00
Buy It Now

» View on eBay #sponsored
Hifi 300b vacuum tube - hifi,

Hifi 300b vacuum tube - hifi,

$429.40
Buy It Now

» View on eBay #sponsored
Single end class - class, 6f3+300b

Single end class - class, 6f3+300b

$819.00
Buy It Now

» View on eBay #sponsored
Oldchen stereo tube - hi-fi,

Oldchen stereo tube - hi-fi,

$830.30
Buy It Now

» View on eBay #sponsored
Sophia electric 274b mesh - sophia,

Sophia electric 274b mesh - sophia,

$229.00
Buy It Now

» View on eBay #sponsored
Magnequest 030 output - magnequest, fs-030

Magnequest 030 output - magnequest, fs-030

$750.00
Buy It Now

» View on eBay #sponsored
Minava 300b single - minava, single-ended

Minava 300b single - minava, single-ended

$922.08
Buy It Now

» View on eBay #sponsored
Willsenton r300 plus 8w - willsenton,

Willsenton r300 plus 8w - willsenton,

$1569.40
Buy It Now

» View on eBay #sponsored
1pc class single ended - a, single-ended

1pc class single ended - a, single-ended

$708.80
Buy It Now

» View on eBay #sponsored
Custom 300b single ended - 300b, single-ended

Custom 300b single ended - 300b, single-ended

$4799.00
Buy It Now

» View on eBay #sponsored
Willsenton 800i single ended - willsenton,

Willsenton 800i single ended - willsenton,

$3027.84
Buy It Now

» View on eBay #sponsored
Hifi 300b vacuum tube power - vacuum,

Hifi 300b vacuum tube power - vacuum,

$79.94
Buy It Now

» View on eBay #sponsored
Line magnetic tube amplifier - line,

Line magnetic tube amplifier - line,

$3999.00
Buy It Now

» View on eBay #sponsored
Welborne labs laurel - laurel, 300b

Welborne labs laurel - laurel, 300b

$44.99
Buy It Now

» View on eBay #sponsored
Sophia electric 300b - sophia, 91-01

Sophia electric 300b - sophia, 91-01

$2950.00
Buy It Now

» View on eBay #sponsored
Audio enclosure chassis - gp-audio, enclosure/chassis

Audio enclosure chassis - gp-audio, enclosure/chassis

$149.99
Buy It Now

» View on eBay #sponsored
Quicksilver 300b set mono - set,

Quicksilver 300b set mono - set,

$5700.00
Buy It Now

» View on eBay #sponsored
Manley labs neo classic - labs, neo-classic

Manley labs neo classic - labs, neo-classic

$6361.29
Buy It Now

» View on eBay #sponsored
Tube preamplifier amplifier - tube, preamplifier/amplifier

Tube preamplifier amplifier - tube, preamplifier/amplifier

$110.00
Buy It Now

» View on eBay #sponsored
Western electric 300b - western,

Western electric 300b - western,

$242.66
Buy It Now

» View on eBay #sponsored
Takatsuki 300b vacuum - takatsuki, ta−300b

Takatsuki 300b vacuum - takatsuki, ta−300b

$1968.19
Buy It Now

» View on eBay #sponsored
Muzishare r100 amplifier - r100,

Muzishare r100 amplifier - r100,

$2725.00
Buy It Now

» View on eBay #sponsored
Audio tekne we300b 8403p - tekne,

Audio tekne we300b 8403p - tekne,

$9999.88
Buy It Now

» View on eBay #sponsored
Vintage nos panasonic - vintage,

Vintage nos panasonic - vintage,

$110.00
Buy It Now

» View on eBay #sponsored
New box matching - matching, pair

New box matching - matching, pair

$1600.00
Buy It Now

» View on eBay #sponsored
300b stereo tube singled - 300b,

300b stereo tube singled - 300b,

$3200.00
Buy It Now

» View on eBay #sponsored
Set 300b vacuum - vacuum, tube

Set 300b vacuum - vacuum, tube

$455.00
Buy It Now

» View on eBay #sponsored
Elekit power amplifier vacuum - elekit,

Elekit power amplifier vacuum - elekit,

$1058.00
Buy It Now

» View on eBay #sponsored
Parallel tube 300b - an,

Parallel tube 300b - an,

$240.12
Buy It Now

» View on eBay #sponsored
Waiting audio 300b tube - audio,

Waiting audio 300b tube - audio,

$2980.00
Buy It Now

» View on eBay #sponsored
Manley neo classic - manley,

Manley neo classic - manley,

$5195.00
Buy It Now

» View on eBay #sponsored
Sansui outpt transformers - sansui,

Sansui outpt transformers - sansui,

$399.00
Buy It Now

» View on eBay #sponsored
Sanborn 126 126b 64 - hp/sanborn, 64-300a

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

$12.33
Buy It Now

» View on eBay #sponsored
Reisong a50 mkiii 300b - mkiii, hifi

Reisong a50 mkiii 300b - mkiii, hifi

$1899.00
Buy It Now

» View on eBay #sponsored
Grade sophia electric - grade, blue

Grade sophia electric - grade, blue

$229.99
Buy It Now

» View on eBay #sponsored
Sun audio 300be - sun, sv-300be

Sun audio 300be - sun, sv-300be

$3000.00
Buy It Now

» View on eBay #sponsored
Single ended tube amplifier - tube,

Single ended tube amplifier - tube,

$862.60
Buy It Now

» View on eBay #sponsored
One matched pair linlai audio - pair,

One matched pair linlai audio - pair,

$216.41
Buy It Now

» View on eBay #sponsored
Inland controls model - inland,

Inland controls model - inland,

$300.00
Buy It Now

» View on eBay #sponsored
Otomon lab 71a 101d drive - lab,

Otomon lab 71a 101d drive - lab,

$5800.00
Buy It Now

» View on eBay #sponsored
Magical 2026 new sophia - new,

Magical 2026 new sophia - new,

$1599.99
Buy It Now

» View on eBay #sponsored
Otomon lab 300b drive - otomon,

Otomon lab 300b drive - otomon,

$7500.00
Buy It Now

» View on eBay #sponsored
300b437 onan amplifier assy - amplifier,

300b437 onan amplifier assy - amplifier,

$69.95
Buy It Now

» View on eBay #sponsored
Canary audio reference 300b - audio, 2

Canary audio reference 300b - audio, 2

$24.95
Buy It Now

» View on eBay #sponsored
Matched pair linlai - 1,

Matched pair linlai - 1,

$119.04
Buy It Now

» View on eBay #sponsored
Tango 10836 power transformer - 10836,

Tango 10836 power transformer - 10836,

$226.58
Buy It Now

» View on eBay #sponsored

Looking for more 300b amplifier?

Search eBay live — fresh results filtered for the best value, updated every hour.

🔍 Search live deals
📊96 listings · from $12.33 · avg $1614.82
⚠️ These listings were last updated more than 16 days ago. Search for fresh listings

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 →

Try this: amp speakers | amplifier rack | carvin ag100d | emotiva amp | emotiva amplifier | fender showman | jtm45 | qsc plx 1602 | rotel ra 1520 | vox organ

Shop by budget

< $25 $25 – $50 $50 – $100 $100 – $200 $200 – $500 > $500

Everything you need to know about 300b amplifier

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.

🔍 300b amplifier Search live on eBay