If you want a fixed gear for the reason of it "not being common" as CC said, you will be sorely mistaken. Fixed gears are a fad these days. As was said above, you COULD make that frame into a fixed gear bicycle. But (as said above) I would not recommend it, since it would be more trouble than it is worth. If you do buy that frame, put gears on it, and know how to use the bike properly. If you are an experienced racer, then this might be a great addition to your stable. If you are a beginner, buy a bike that is functional (aka comfortable and useful for your needs) and be done with it. Don't buy a bike just because your friends might be impressed.