I'm planning on buying a road bike to convert to a fixed gear. I've found one on craigslist and the guy is willing to give it to me for $80, however I'm a bit skeptical of giving the money because I've asked several times what brand the frame is and he has avoided answering it. here is the ad http://sfbay.craigslist.org/eby/bik/2837251334.html
also if it's a generic brand is it worth dishing out $80? I mean it is quite cheap, but I'd rather fork over 120$ for a schwinn or Peugeot that I've seen. And also as for the rear wheel/gear/hub what are some recommendations for turning it from 6 to 1 fixed gear? Should i just buy spacers and use one of the stock gears? I've been reading on the forums but haven't been able to decide and also figure out what number of teeth I should go with. Btw, I just started cycling this past week. I've ridden on and off but now I'm getting into it more, but frankly the idea of one single gear appeals to me more than many.

Also I'm not trying to be a hipster. I may upset some people with this but making a fixed gear and painting it some extravagant colors just because your friends did is stupid. I want a fixed gear because they are awesome to ride. That's what cycling and riding should be about. Not pink and purple combos. No offense to those that have those colors and actually ride.

Much gratitude replies. Thanks!