1988-S Washington Quarter Proof Value
Real sold prices from 3 tracked eBay sales — tracking since July 2026.
Computed from 3 real eBay sold listings tracked by CoinGrader since Jul 2026. Not price-guide estimates.
Recent sales
| Date | Grade | Price | Listing |
|---|---|---|---|
| Jul 13, 2026 | PCGS 70 | $17.53 | 1988 S 25C Washington Quarter Proof PCGS PR70DCAM |
| Jul 13, 2026 | Raw (ungraded) | $1.00 | 1988-S San Francisco Washington Quarter 25C Proof Copper KM# 164 |
| Jul 13, 2026 | PCGS 69 | $7.51 | 1988 S US Proof Washington Quarter 25c PCGS PR69 DCAM |
Frequently asked questions
How much is a 1988-S Washington Quarter Proof worth?
We have recorded 3 real eBay sale(s) for the 1988-S Washington Quarter Proof — see the recent sales list for actual sold prices.
Where do these prices come from?
CoinGrader continuously tracks completed eBay sales for this coin. Prices shown are computed from those real transactions (recent sales weighted more heavily, obvious outliers removed) — they are market prices, not catalog or price-guide values.
Should I get my 1988-S Washington Quarter Proof graded?
It depends on the coin's condition. You can upload photos to CoinGrader for an instant AI grade estimate and market value before spending on professional certification.
Have this coin?
Grade it and track its value. Upload photos for an instant AI grade estimate and a market value based on real sales like the ones on this page.
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