Do they buy cards like baseball and football cards?

Yeah, just depends on the players and the years. Most anything from the 80s and early to mid 90s won't be worth a lot.

What about a 900 dollar nolan ryan card roockie and the worst trade when he went to the mets card how both in mint con how much you think

Yes they do

Any sport card that is worth anything will be looked at not necessarily bought.