This is actually a good question. I have $30 to spend that I was going to spend on GTA:SA which was on sale for that much at CompUSA. But sadly, they were sold out.
So, I was going to see if I could get Hall on Many Panes on ebay from a discounter for that much (many time when a product first comes out, several will do so), but apparently not.
I then saw "The Crystal Skull" from Necromancer/Troll Lord on ebay for cheap ($14-ish) from FRPGames, and I thought, I'll get that and maybe something for $10, like a box of those Star Wars minis. But I was outbid.
So now I'm pretty much just waiting to see if anything interesting from my to buy list will show up on ebay at a reasonable price. Which it did, but I can't tell you, because I don't want to be outbid...