More details would be nice. Is this the SP-01? Also an approximate round count and description of wear. Most shadows spend a lot of time going in and out of a holster so the finish can wear on the slide and trigger guard. Otherwise they're a sought after pistol and should hold value quite well, especially the SP-01
Edit: not sure if you're buying or selling but if you're buying, ask if there are any upgrades and if so ask who did the install. Most Shadow owners, myself included, replace parts like springs, hammers, and firing pins.