Buy it now for $7.50. It's on eBay, check the link in my sig...thought maybe someone here might want them? It's not a bad price...
Beavis and Butthead - Complete
Mortal Kombat - with box
World Series Baseball - Complete
Sonic 2 - cartridge only
NBA Jam: Tournament Ed - cartridge only
Ecco: Tides of Time - cartridge only, unsure if works