I try to list only Near Mint cards on my For Sale/Trade list because I only want to get NM cards in return. To me, NM means a clean card that is reasonably well centered with 4 sharp corners.
That said, I'll consider pretty much any trade offer. Most of the time though, I do PWE trades with a balanced number of cards from similar eras.
The Buccaneers are my team (#72 on TCDB), but I collect all mainstream football cards. The majority of the cards I trade for go toward completing sets.