specifically that frame is really marginal for that price. but it looks like they're trying to recoup some of the "new" component costs. it ain't worth anything close to 250.00 even in LA. IMO. also BTW that frames probably more like a 54cm not a 50cm. for 250.00 go buy one of these and do a conversion:

http://losangeles.craigslist.org/sgv/bik/923678853.html
http://losangeles.craigslist.org/sgv/bik/927334056.html

(that second bike listing is really big though)