Presentation Remote

I’m looking for a simple presentation remote, something like this, but I really don’t need the laser pointer and all the extra biffs.

I just need something with one or two buttons I could use to move through my presentation. The cheapest one I can find around is abour 40 bucks, and I’m hoping not to spend that kind of money (I just want something simple!).

Anyone happen to know of any simple presentation remotes?