Riser expansion card · Heathkit · price guide
Heathkit SB-104 value
A Heathkit SB-104 riser expansion card sells for about $56 on eBay, from 14 sales between Aug 2, 2026 and Oct 20, 2026. Most sell for $22.19 to $86.25. Used ones bring $55.99, new ones $75.
See the numbers
| Month | Sales | Middle price |
|---|---|---|
| Aug 2026 | 4 | $38.63 |
| Sep 2026 | 6 | $65.50 |
| Oct 2026 | 4 | $40.75 |
The flip math
What one Heathkit SB-104 is worth to a reseller, line by line.
To keep at least 2 times what you pay, bid no more than $4.18. Above $9.91 you lose money after every fee. Run your own numbers.
Local auction prices
1 more is up for bid right now.
One is up for bid right now
Members see every open lot priced, with the max bid to stop at.
See it pricedSelling notes
- 14% of sales shipped free; the rest charged a middle $10.48 for shipping.
- 57% sold through Best Offer, where the real price can be lower than shown.
- 3 sold in the last 30 days, 13 in the last 90.
Questions
How much is a used Heathkit SB-104 riser expansion card worth?
About $55.99 on eBay, the middle of 11 used sales between Aug 2, 2026 and Oct 20, 2026. Most used ones sell for $22.19 to $86.25 once new ones are counted too.
What does a new Heathkit SB-104 riser expansion card sell for?
New ones sold for a middle price of $75 across 3 eBay sales.
How fast does a Heathkit SB-104 sell?
3 sold on eBay in the last 30 days and 13 in the last 90. 14% of sales came with free shipping.
Is a Heathkit SB-104 worth flipping?
Sold at $22.19 on eBay you keep about $14.74 after fees, shipping and a returns buffer. To double your money, pay no more than $4.18 as a winning bid with an 18% premium and 9% tax.
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Have one? Look it up
Snap a photo or scan the barcode and see what yours sells for, new and used, with every fee counted.
Look up yoursHow we got these numbers
- 14 eBay sales of the Heathkit SB-104 from Aug 2, 2026 to Oct 20, 2026, each one checked to be this model (at least half name it in the listing; the rest match it closely).
- eBay prices are completed sales (what buyers paid), not asking prices, from our sold-data provider. We keep only sales of the same product: parts, accessories, bundles and look-alikes are dropped before anything is counted.
- Local auction prices are winning bids on single-item lots at the Kansas and Missouri online auctions we track (HiBid and Equip-Bid sellers), read by our own lot reader. Lots of several units are left out.
- The money math uses our standard costs: 18% buyer's premium, 9% sales tax, a $2.00 lot fee, eBay's 13.6% + $0.40 fee, shipping at cost (never counted as profit) and a 15% buffer for returns and duds. Members set their own.