Comp Calculator · 9,700+ cards · Fair-price verdicts
Card Comp Calculator
Pick any card. We find its closest comparables across 9,700+ cards and show the median, range, and a UNDERPRICED/FAIR/OVERPRICED verdict on your ask or offer.
Try a popular rookie
Frequently Asked Questions
What is a card comp?▼
A comp (short for comparable) is a similar card used as a price reference. When pricing a card for sale or deciding if a buy is fair, collectors look at recent sales of cards with similar attributes: same sport, similar era, similar rarity, similar player tier. The more comps you have, the more confident the fair-price estimate.
How does the Comp Calculator pick comparables?▼
The tool starts from your target card and filters the 9,700+ card database. By default it matches same sport and same decade. You can add filters for same value tier (within 50%) or rookies-only. The tool shows you 8-50 comps and highlights median, min, and max prices.
How accurate are the comps?▼
Our estimates are derived from sold-listings data, dealer catalogs, and auction results. They are directional, not live market prices. Always verify on eBay sold listings before a significant purchase or sale. The more comps the tool finds, the tighter the confidence interval.
What does the verdict mean?▼
If you enter an asking price or offer, the tool compares it to the comp median. Under 75% of median = UNDERPRICED (good buy). 75-125% = FAIR. Over 125% = OVERPRICED. Use this as a starting point for negotiation, not a final answer.
Why might my card have few comps?▼
Ultra-rare cards, one-of-one parallels, and esoteric vintage items may have few or no true comparables. For these, look at price per era-tier or use our Investment Thesis Generator for a structured analysis.