I'm looking for my first bike. I got sized up to be a 56-58cm bike at the local shop. I was hoping someone maybe had a bike of that size that they would be willing to part with for $600ish.
you might also want to check craigslist or slowtwitch. lots of Tri bikes around if you do some digging and can wait to have it shipped, otherwise, your best bet is to hit the local bike shops and buy new.