I'd part out the Wavebirds and batteries, Pikmin 2, Konga 2 and the Bongos, and maybe Zelda, RE 2-pack and Battalion Wars. I'd also sell all the Mario-related games in one bundle (or individually, if you want to mail lots of packages). That will collectively probably net you around $150-$250+ on eBay.
You should be able to sell the remaining games and system for around $100, I'd guess.