From a CD/Game Exchange I went to this evening:
NES:
Wrath of the Black Manta (cart only) - $1
Pro Wrestling (cart only) - $1
Genesis:
Beauty and the Beast: Roar of the Beast (complete) - $2.50
Tecmo Super Baseball (complete) - 50 cents
Game Gear:
Dragon Crystal (w/ GG game case) - $5
I overpaid a bit for Dragon Crystal, but I passed up a cart only copy for the same price at NWCGE last September, and this is the first copy I've seen in the wild since then (which is somewhat odd considering that it's an R2). Pro Wrestling is going to a friend.