I did take that into account as well. the wii fit was another 90 plus all the games and accessories. so 200 for the wii, 90 for the wii fit, 4 games at minimum $30/per, extra controller & nunchuck $45, wireless sensor $20, Gun holder $15, EA sports Active holster and resistance band $20,
Rechargeable battery $10. = $520. Given it's a year and a half old, and used I don't think that $350 was a bad price. not to mention you can play the burned backup copies as well and i've got a bunch of those too.
I did say willing to trade for parts too...lol