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HP‑21 Calculator with Charging Cord
$50.00 sold ❌ Overpriced
Sold 2026-03-12
Toms Brook, Virginia, US
From listing #211438: Vintage Hewlett-Packard HP-21 Calculator With Cord Untested
View Listing
Untested HP‑21 calculator, charging cord included, battery terminals show corrosion, sold for parts.
Item Details
Brand:
Hewlett-Packard
Item Type:
Computer
Calculator
Computer Model:
HP-21
(1975-1978)
Platform:
HP Calculator
Cosmetic condition:
Fair - Noticeable wear, scratches, but complete
Functional condition:
For Parts - Not repairable, parts only
Comes With
Hewlett-Packard HP-21 - Computer Market Overview
Based on
45 sold
computers,
one should expect to pay ~$66 for a working unit.
However, this unit's condition (Fair / For Parts) brings its guide price to $18.
15 others are also listed for sale.
This item ($50)
is 2.8x the guide price (~$18).
Price by Condition
| Refurbished | Fully Working | Partially Working | Powers On | Untested | Not Working | For Parts | |
|---|---|---|---|---|---|---|---|
| New | — | ~$505 | — | ~$404 | — | — | |
| Mint | — | ~$416 | ~$311 | ~$291 | ~$333 | — | — |
| Excellent | ~$209 | $100 (2) ~$190 | ~$143 | ~$133 | $72 (2) ~$152 | ~$67 | ~$48 |
| Good | ~$131 | $119 (13) ~$119 | ~$89 | $60 (3) ~$83 | $60 (14) ~$95 | ~$42 | ~$30 |
| Fair | — | $105 (1) ~$89 | ~$67 | ~$62 | $29 (4) ~$71 | $75 (3) ~$31 | THIS ITEM $50 (1) ~$23 |
| Poor | — | ~$65 | ~$49 | ~$46 | $37 (1) ~$52 | $38 (1) ~$23 | ~$17 |
$X (N) — Median sold price (N sales)
~$X — Guide price
This item
$X (N) — HP Calculator (platform)
Guide prices based on 45 sales, Good/Fully Working baseline ~$118.
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Compare to HP Calculator platform aggregate:
