I do feel bad going to an archery shop shooting all their stuff then turning to ebay to get a better deal though.
Most people that do this end up paying more in the long run. Most pro shops will give free set up and tune, possibley throw in some range time, free tuning for a year, etc... etc... Buy it from Ebay and you will be paying fro every single thing that the pro shop has to do to work on the bow.