Roland · Analog monosynth · Pre-MIDI classics
Roland sold the TB-303 Bass Line from 1981 as a computerised bass player, built to sit beside the TR-606 Drumatix in place of a bassist. Tadao Kikumoto designed it, and it flopped because it sounded nothing like a bass guitar. Roland dropped it in 1984. Secondhand ones were cheap, and in 1987 Chicago's Phuture twisted its knobs while it played to make Acid Tracks, often called the first acid house record. Hardfloor, Josh Wink and Fatboy Slim followed, the last with a single called Everybody Needs a 303. One oscillator gives a saw or square wave into a resonant filter, and the built-in sequencer lets you add accent and slide to each step, which is where the squelch comes from. It runs on four C batteries or an adapter, and the batteries keep its 64 patterns alive when it's off. Some 303s have been modified, the Devil Fish being the best known, and clones look a lot like it in thumbnails, so confirm exactly what's for sale.
Robin Whittle, who designed the Devil Fish mod, says the unsealed tact switches clog with dust and can make a 303 impossible to program. Leaking batteries corrode the contacts, and he has also found corroded pins on the memory chips that stop patterns saving properly.
Buying guide
Only about 7 TB-303s are for sale, so the $3,825–4,525 delivered band is a rough read, and none is titled tested or serviced. We'd start with the one in Australia at $3,180 delivered, and before paying get a video programming a pattern with every note button plus accent and slide, since dust-clogged switches are the 303's known fault, and a photo of the serial number to rule out a clone. Skip the two titled no mods from zero-feedback sellers, since a new account asking thousands is a known scam pattern. Soundgas's one, boxed with its bag, asks $7,898, about $3,370 over the band, and the box is the only stated reason.
$3,180.07est. delivered
The lowest delivered 303 at $3,180, about $645 under the band, from a seller in Australia. The title is bare, so ask for a programming video, a battery-bay photo and the serial number before you pay.
Roland TB-303 Bass Line Analog Synthesizer
Delivered prices include shipping as eBay quoted it to a US address on Oct 5, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 5, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$3,180.07est. delivered
$3,130.20 + $49.87 shipping
Buy It Now$3,130.20
This seller takes offers, and many sellers accept less than the asking price.
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Good buy
Plain title, no test claim. Ships from Australia.
Seller: bacterma-0
100% positive
Used$3,792.94est. delivered
$3,657.88 + $135.06 shipping
Buy It Now$3,657.88
Our take
Titled 1981, no test claim. Ships from France.
Seller: olivar_garage
100% positive
Used$4,100.00est. delivered
$4,000.00 + $100.00 shipping
Buy It Now$4,000.00
Our take
Titled with VCA, gate and CV. Ask whether that's a mod and who fitted it. Ships from Japan.
Seller: shop908
100% positive
Used$4,520.00est. delivered
$4,500.00 + $20.00 shipping
Buy It Now$4,500.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Plain title. Ships from Japan, from a seller just under 98% feedback.
Seller: musical-0820jp
97.9% positive
Used$7,898.26est. delivered
$7,785.71 + $112.55 shipping
Buy It Now$7,785.71
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Boxed with its bag, about $3,370 over the band. The ask includes 20% UK VAT.
Seller: soundgastechltd
100% positive
Used$3,861.15est. delivered
$3,750.00 + $111.15 shipping
Buy It Now$3,750.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
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Check the seller
Titled no mods with original case, from a zero-feedback seller. Pay only through eBay checkout.
Seller: fdraugho
No feedback yet
Used$4,519.05est. delivered
$4,500.00 + $19.05 shipping
Buy It Now$4,500.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Titled original with no mods, from a zero-feedback seller. Pay only through eBay checkout.
Seller: analogenduser
No feedback yet
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