The prices listed don't include shipping. I can cut you a deal if you want more than one thing.

NES
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Mike Tyson's PUNCH-OUT!! (cart only, slight label damage) - $8
Pirates! (cart only) - $12
Swords and Serpents (cart only) - $3

XBOX
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Soul Calibur II (complete) - $7
Star Wars Battlefront II (complete) - $8
Star Wars Republic Commando (complete) - $10