You need to sell them separate to maximize your return.
Ebay is a crap shoot. There are always $300 might and magics, there are always $180 Dungeon Explorer 2, $150 Godzillas, and $90 Air Zonks - so you know those aren't prices you can expect to sell at. Like I learned in Grad School, Dynastic Hero is only worth what someone is willing to pay for it. That, and stay away from hookers with walkie-talkies.
Not to be a total 'terd in a punch bowl' d-bag, but three weeks ago a seller on ebay had roughly HALF of the SCD games you have listed, plus some gem Hucards, in a bundle that sold for $175 in a 7 day AUCTION. No mis-spelled title, no crappy pics. DE2, Exile:WP, Beyond Shadowgate, Order of Griffon, Vasteel, and about 20 other 'notables' for $175. That auction has was noted in a thread here a few weeks back.
Break them apart here or eBay if you're looking to maximize your return.
Camelot, tis a silly place.