I feel for you. Seriously, I've got that gut-punch feeling after reading what happened. F*ck that guy. The only thing I'd want to hear from him is "I've got your games and I'll bring back to you right away." I'd be tempted to tell him that, too, and also that'd I'd ignore anything else he ever says.

If it were me, I'd sell the rest and do emulators or a flash cart to play. You won't be bogged down and constantly reminded of what happened by the physical collection. Besides, the pricing on so much of what you lost is just so high now. I don't know if you have a family or what, but I do, and I'd have a really hard time justifying those purchases to myself with college and retirement to save for. If you were into a more recent system, it might not be a bad idea to focus on one of those; Wii, PS3, xbox, or 360 might be good choices right now. Gamecube maybe, but some of those games are already up.

Only other option for me would be to ask for the games as gifts, and expect just that for bdays and xmas for many years. But I have to tell you, I have my original gameboy and games still, while I gave away my NES and games, and the replacement NES games just aren't the same. Don't get me wrong, I love my collection, but having the actual carts you played as a kid is pretty special.