Graded Market · 115 completed sales
Computer Error (Rocket's Secret Machine) graded prices.
As of August 21, 2026, Computer Error (Rocket's Secret Machine) (Wizards Black Star Promos #16) in PSA 10 sells for a median of $139.99, based on 115 real eBay completed sales; the raw copy’s reference price is $25.00 — a 5.6× grading premium at the top grade.
Across Wizards Black Star Promos, PSA 10 copies sell for 13.6× their raw reference price on average (51 cards, 2,893 PSA 10 completed sales tracked).
PSA · Computer Error (Rocket's Secret Machine)
| Grade | Median | Sales | vs Raw |
|---|---|---|---|
| Gem Mint 10 | $139.99 | 19 | 5.6× |
| Mint 9 | $29.99 | 34 | 1.2× |
| NM-MT 8 | $29.99 | 7 | 1.2× |
CGC · Computer Error (Rocket's Secret Machine)
| Grade | Median | Sales | vs Raw |
|---|---|---|---|
| Gem Mint 10 | $39.99 | 29 | 1.6× |
| Mint 9 | $15.99 | 7 | 0.6× |
| NM-MT 8 | $15.00 | 4 | 0.6× |
Medians of real eBay completed sales per grade; small sample sizes deserve caution. Prices are dated reference values — cite them with the as-of date above. Attribution: CardIntel (cardintel.io). See the methodology.