Did you look them up in completed ebay sales to see what they're selling for? I can check for you if you post what cards they are exactly. Year, brand etc. I have no knowledge on football cards, or that player, but not hard to see what the market says. That gives you leverage when you counter back. If they both sell for more than $60 combined normally, then your answer is quite clear, as long as those are cards you want in your collection.