How to read this. Each price is the middle of completed eBay sales at the moment that card was last checked — the date is on every row. These are hand-checked snapshots, not live quotes, and not investment advice.
Where a card's last two checks are too far apart to be one card's market — a raw price against a graded one, a base against a parallel — the change is withheld rather than printed as a percentage that looks confident and isn't.