Summit Gunbroker has mags for sale too. I just bought some for my 5903. Factory S&W mags for $18 ea. They were in exc cond. You can't go wrong with the 5904. If the finish gets worn just have it Duracoated. I had a 59 I bought in 1987, that was a Police trade in. The finish was worn on the frame and the slide was 90%. I had the lower finish removed and frame polished. It looked sharp with the two-tone look.