The 1970 Topps Football set is special ... both a nostalgic and a value-driven perspective. According to PSA, there are a total of 1,276 graded versions of this card, but there are only twenty ...

When it comes to vintage football cards ... but there's also a tremendous difference in the value of PSA 10s (average sale price $4,888.57/card) vs. PSA 9s (average sale price $370.52/card).

Well, the NFL also gets report cards. Players are surveyed from August to November, and they respond to questions covering 12 categories. Their answers are tallied and assigned a letter value.