For all vintage trading cards, those printed in the mid-1970s and earlier, the number one characteristic in determining value is centering ... cards across all sports in the vintage era ...

Navigating the trading card and sports memorabilia hobby can seem ... First the purpose it serves: The value of trading cards is very much tied to the condition they’re in.

Overall value of the cards has spiked by 20% in the past six months—according to Elizabeth Gruene, who oversees Professional Sports Authenticator (PSA)’s pop culture and trading-card-games ...