How it works: each card is valued at the middle of its completed sales from the last 30 days, via CardGauge. A raw card is priced only from ungraded sales; a graded card from graded sales, with every grade pooled (PSA 10 ≠ PSA 9). When the sales mix different versions of a card, it won't price it. A guide to weigh a trade — not gospel, not financial advice. The "sold" links go to eBay, and CardGauge may earn a commission at no cost to you.