The epic is a fsxc frame, raced by team s-works. Quite nice IMO. If you get it, have a qualified Specialized mechanic inspect the rear shock to check that the brain is working good and that the seals are holding air. If it all checks out, you've got yourself a sweet ride. If there are rear shock issues, you may be able to get it replaced for cheap/free, depending on the model of the shock(certain models had issues requiring a replacement shock, which Specialized provided as a warranty [in our shop, at least]).