USED B550 AM4 mATX PRICE
What a used B550 AM4 mATX is worth today, tracked from verified eBay sold listings so the numbers reflect what people actually paid — not what sellers are asking.
A used B550 AM4 mATX is currently worth about $79.98, based on verified eBay sold listings through October 6, 2026. The 30-day average is $77.58 and the 90-day average is $66.36. That is up 33.3% over the last 30 days, from $60.00. We have tracked 36 price points for this part since January 2026, with a recorded range of $50.00 – $138.
If you are buying a used B550 AM4 mATX
Anything up to about $70.00 is a normal market price from a seller who tested the part and will take it back. Around $60.00 is a good buy. Below that, work out why: untested, no returns, cosmetic damage, or missing accessories are all legitimate reasons for a discount — and all reasons the price should be lower. A price far under the range above, from a seller who won’t answer questions, is the oldest bait there is.
If you are selling one
Listing privately around $60.00 is realistic if you are willing to photograph it, answer questions, ship it, and absorb the occasional return. Selling it outright — to a shop, or as part of a whole machine — lands nearer $46.00, because the buyer is taking on the testing, the warranty and the time. Neither number is wrong; they price different amounts of work.
Recorded price history
Every dated observation we hold for the B550 AM4 mATX, newest first — each one the average of completed eBay sold listings for that week. All 36 readings since January 2026.
| Date | Average sold price | Change |
|---|---|---|
| $79.98 | no change | |
| $79.98 | +5.0% | |
| $76.14 | +2.6% | |
| $74.20 | +23.7% | |
| $60.00 | no change | |
| $60.00 | −17.0% | |
| $72.33 | +20.6% | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | −13.3% | |
| $69.20 | +15.3% | |
| $60.00 | no change | |
| $60.00 | −9.7% | |
| $66.41 | −0.1% | |
| $66.45 | +3.0% | |
| $64.54 | −5.8% | |
| $68.55 | +8.3% | |
| $63.27 | +5.5% | |
| $60.00 | no change | |
| $60.00 | +20.0% | |
| $50.00 | −16.7% | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | no change | |
| $60.00 | −24.0% | |
| $78.99 | no change | |
| $78.99 | −42.8% | |
| $138 | +6.2% | |
| $130 | no change | |
| $130 | −4.8% | |
| $137 | +70.7% | |
| $80.00 | — |
Everything above is computed from 36 dated observations of completed eBay sold listings for the B550 AM4 mATX, the most recent from October 6, 2026. These are market values for a working, complete unit — not our asking price, and not an offer. How we calculate these prices →
We currently have 1 tested unit of this part in stock at $70.00. Browse our motherboards in stock →
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WEEKLY PRICE REPORT
