Hey guys, I found this Grand Prix RS 5000 for cheap online and was wondering if it was a good buy. The bike does not come with a chain. It has a 5 speed shimano shifters, a year old kendra tires and the frame is in a okay shape with a but of rust. The handle bars are pretty rusty along with the fenders. The guy has not used the bike for two years and has been sitting on his balcony. Is it okay to buy?