I say if it's what you want then go for it. When I bought my current bike I was 292 lbs and wanting to get on the fast track to losing weight. I bought a 2006 Specialized Roubaix Elete (Carbon frame and fork) from CraigsList. The bike was in almost perfect condition with no cracks or problems of any kind on the frame or components. I had my LBS check it over and help set it up and have been riding the heck out of it since. I currently am at 252lbs and am still on the same bike with no problems other than having to replace the stock wheels for more "Clyde" friendly wheels in the form of a set of Velocity Deep Vs.