You could almost get a 100 pack for $20 if you really looked. Might be off brand, but whatever.
Everyone here is kidding themselves. PS1s are going for ~$20 on eBay. Minus controller, $15. Add the chip (that'll add a bit of value - a chip is $20 plus install) and it's worth something.
Not to mention the PS1 had some really good games. A hell of a lot better than the crap on the PS3.