Are Mark McGwire Cards Worth Any Money? But in terms of modern cards it was way up there alongside the 1989 Upper Deck Ken Griffey Jr. rookie card. McGwire was one of the most popular players playing for one of the most powerful teams in baseball. They aren’t worth as much as they used to
How Do I Know If My Trading Cards Are Worth Money? To check, look for a year somewhere on the card fronts or go to the card backs and look for a copyright date. Even common cards from some vintage sets can bring some money, so be sure to keep an eye out for older
How Do I Know If My Cards Are Worth Money? The best way to see your cards value is to check previous sales data. As most cards are sold online these days, you can easily find the sales values from popular card sites. What baseball cards from the 80’s and 90’s are worth money? Derek