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HP 20s Scientific Calculator
Part of a bundle with 2 different items.
Bundle sold for: Best offer accepted
Estimated item value not yet calculated.
Estimated item value not yet calculated.
Sold 2026-01-30
Salem, Oregon, US
From listing #150073: Hewlett-Packard 20s/21s Vintage 1980s Scientific Calculators with Case, Working
View Listing
Vintage HP 20s calculator with case, working. Includes original instructions.
Item Details
Brand:
Hewlett-Packard
Item Type:
Computer
Calculator
Computer Model:
HP-20S
Platform:
HP Calculator
Cosmetic condition:
Good - Moderate wear, normal for age
Functional condition:
Fully Working - Tested and fully functional
Comes With
Hewlett-Packard HP-20S - Computer Market Overview
Based on 178 sold computers, one should expect to pay ~$30 for a working unit. 36 others are also listed for sale.
Price by Condition
| Refurbished | Fully Working | Partially Working | Powers On | Untested | Not Working | For Parts | |
|---|---|---|---|---|---|---|---|
| New | — | ~$127 | — | ~$102 | — | — | |
| Mint | — | $33 (1) ~$105 | ~$79 | ~$73 | ~$84 | — | — |
| Excellent | ~$53 | $30 (3) ~$48 | ~$36 | ~$34 | $26 (2) ~$38 | ~$17 | ~$12 |
| Good | ~$33 | THIS ITEM $30 (127) ~$30 | ~$22 | $6 (1) ~$21 | $30 (34) ~$24 | ~$10 | $5 (1) ~$7 |
| Fair | — | $30 (5) ~$22 | ~$17 | ~$16 | $25 (3) ~$18 | ~$8 | ~$6 |
| Poor | — | $43 (1) ~$16 | ~$12 | ~$12 | ~$13 | ~$6 | ~$4 |
$X (N) — Median sold price (N sales)
~$X — Guide price
This item
$X (N) — HP Calculator (platform)
Guide prices based on 178 sales, Good/Fully Working baseline ~$29.
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Compare to HP Calculator platform aggregate:
