I am looking into converting an older (70s-80s) road bike, and was wondering if someone could help me out with a list of older brands that would make a good fixie. I've found a couple of frames on craigslist, but according to some other posts, Free Spirit, and Galaxy are very cheap bikes. I'm looking to go pretty cheap, but still want a decent frame (under $70 or so). I've read that Schwinn WorldSport frames aren't bad, and I've read a lot about Peugeots. Any others?