We were on the edge about whether or not to bring this to your attention, because we didn't know how they would be in stock. But, just so you know, you can now buy a 20GB PS3 for $450 at Gamestop.com. It's weird, largely because it's just not really a good bargain. Is saving $50 bucks really a fair trade for a hard drive with less space than your discs? We don't think so.
But hey, maybe you've got an extra hard drive just lying around, who are we to say? Maybe you just like depriving yourself. Either way, we doubt these will last long, so you may want to act fast if you're in the market.