Scope out what you are looking for and the folks here generally have some pretty sound advice. I ride a Jamis Coda sport when my commute is under 10 miles one way. I got it new from performance for around 300.00 on sale. That's not a bad bike. On the other hand I was riding around the neighborhood a few months back and saw a garage sale that I stopped at......guy sold me a Giant Cadex 980 Carbon fiber frame with all Shimano 105 for 50 bucks....it had hardly been ridden. I put new tires and a new saddle on it and ride it on the long commute 20 miles one way once a week. Go figure.....