Tips for Buying a Used Gun

"Everybody knows the old saw about how used law enforcement trade-ins are a great deal because, while they might show a bunch of cosmetic wear, they've rarely been shot all that much. A much bigger deal is that the police trade-ins have generally been maintained by a department armorer. If Blastomatic put out a technical service bulletin to replace recoil springs or whatever, it's fairly certain that those department guns got the springs replaced, for liability reasons if nothing else."