I was one of those people. I have THIS ONE
These will not re-bead a tire though. About the only thing that will do that is a Co2 tank. To re-bead a tire it takes a stong fast burst of air. But for airing up tires after the trail the above compressor is great. I was fortunate enough to get mine for $25 when the company that makes them first put them out on the market. The jeepers got wind of them and the positive reviews and they sold out FAST at that price. Even at the current price it is still a great value. They have been compaired to the much more expensive Viars.