Mousepads are practically free. Places all over give them out for free. I must have hundreds I've never used. There was a guy a few years ago and he had so many free mousepads he made a couch out of them.
I bought a cheapo mousepad at Dollar Tree a while back. It was nothing special though. I'm still using the first mousepad I ever bought in 1999 or something. I think it was one of those that had weird bubble designs on it.