I have been buying and, occasionally, selling guns through Gunslingers for close to fifteen years. I have found the owner to be polite and helpful -- More than once he tracked down a particular rifle for me. His prices are in line with the other gun stores in the area -- sometimes a few dollars less, sometimes a few more. When I sell a gun at auction or on consignment, he has always gotten me a good price and his commission is in line with rest of the industry.
All told it is a good place to buy a gun.