I would definitely try to trade or sell outright. Gun shops, while great to shop in, do not generally offer much for buying used guns. (Also the extra moon clips are of little value to the gun shop unfortunately, but may attract a potential buyer somewhat). I don't know what make or model 1911 you are looking for, but you most likely will have to add a little or more of your own cash. Used Ruger guns like yours, while of excellent quality, rarely bring premium prices. Off the top of my head, I'd say try to get $400.00. You'll most likely be offered somewhat less.