Make REAL sure they aren't nasty old or even nasty new Token Ring cards. Many cards that looked very promising to me, turned out to have the weird RJ45 version of token ring, and weren't ethernet cards at all. I am real suspicious of any IBM chip on such a card now. As for value, a nice card like a LanStreamer with 10bt is worth maybe $10 - $15, garden variety 10bt maybe $5 - $10, and 10b2 coax maybe $5, and those are retail prices (ebay etc.). When I dig them out of a bin its more like buck or two each, or $10 for a handfull. Value in MCA is still pretty much Sound cards and some video cards.