Wow, what a bargain. Units Complete In Box do not go below 200 USD / € for a year or two now. The last boxed systems with games I followed were alway 300+ USD, so I gave it a go for 450 USD including shipping, but with 4 additional games and Mint in Box / never used. Still, even if yours is "naked" without box, it was a fantastic price.
E.g., this one was the one sold a week before I got mine:
http://www.ebay.de/itm//251518763118
I bailed out at 300 USD...
Indeed, Multiplayer makes this thing interesting, and the technology is really charming.