I believe pg mentioned somewhere that they didn't actually make anything out of the whole ordeal after paying back their investors; fees were probably the least of their concerns ;). Still, an interesting use case of eBay.
Congrats :)! Now that you mention it, I believe I recalled incorrectly. I think PG mentioned that you guys used the proceeds to bootstrap your next business, Justin.tv, not that you guys didn't make anything out of the eBay auction (strictly speaking).