Just picked up a G21 for a song. It is in PERFECT shape inside...doesnt even look like its been fired. The outside has some very very light wear on the slide corners towards the front, obviously holster wear as the PO said it was a police trade. As well of a bit on the slide release. The gun shoots out perfectly, and since I have large hands I dont find it too "bulky" or large, however, the night sights are pretty dim. Other than that, are there any pitfalls/footnotes/personality traits I should know about this model/gen? Im also having trouble tracking down the serial number. It starts with "BGGxxx". Any help on that would be appreciated too. Thanks!