People always run up the bids on their own stuff on those auctions. It's just a joke. They'll end up paying a few bucks to get a few laughs. I'm not sure what percentage eBay charges these days (it was 6% I think) so for a $30 auction that's about $1.80 plus whatever fees. They aren't supposed to do that but they always do. I've seen the same items "sell" 50 times because someone wanted a bunch of bucks for something. If you don't get a certain price for your item you don't have to pay nearly as much either BTW but they use the bids as advertising really. They are trying to make it look like the item is wanted badly. In this case they just want the joke to be funnier.