Normally the Xbox and PS2 sell for $179...$199 for the PS2 with network adapter.
I almost bought my Xbox at Costco. The only reason I didn't was that I had no plans to buy the DVD remote, didn't really need a second controller, and the games are the same ones normally included...so Costco didn't seem like much of a deal for me.
If I remember correctly, Costco's PS2 bundle includes 2 games (one current, one "Greatest Hits"), an extra controller, a memory card, and the network adapter.