Gik-tal good advice. I have purchased P226's new and used and there really isn't any mystery to buying a used Sig....pull the slide off check the rails for wear, verify function of slide hold back and de-cocker and eyeball the barrel for excessive wear outside and inside. Everything, except the frame (and even that is fixable with a trip to Sig) is easily removed and replaced with simple hand tools. Some repairs really should goto a qualified armorer but the Sigs I own have typically needed very little in the way of repairs, mostly just springs which I feel are maintenance items and one slide hold back that wore out. I have several German made guns which are 35 years old and they are still tight and super accurate so with proper care and maintenance you will own a metal framed Sig for life. I cant say the same with any polymer frame pistol but this isn't an opinion its just ignorance since I have only Kahr's and Sig's, with polymer frames for less than 7-8 years and cannot provide an opinion on their potential useful service lives. My guess its very long and likely as long as metal framed guns but now we get to far off topic.