It's difficult to tell from that picture. It doesn't look horribly filthy. Someone probably took reasonably good care of it. If it fits, doesn't have any rust (chains rust easily and can be replaced), shifts well, brakes work, grab it. I don't think you can do much better at that price. A coworker of mine bought a $200 CL bike with downtube shifters and the paint was all scratched, the seat torn and it had the dirtiest yellow bar tape.