Not many great games there, Super Ghouls n Ghosts is probaly the only game thats worth something (although Street Fighter 2 is a classic), but without boxes or manuals snes carts arnt worth a lot at all. (NTSC carts being the most worthless)
I think that you could probaly, maybe fetch £45 - £50 on ebay, but the only problem is that if you list it on ebay as modded they will remove it due to breach of ebay rules, I tried to list a modded Sega Saturn and they removed it straight away!
Btw can you post some pics please