I was in a local shop today and found a used GSR 1911 on the shelf. It is SN GSO18XX. It has some scuffs in the finish but is not scratched. It is all stainless and it has the wood grips. I can buy it for $400 plus tax. Is there any good reason I should not pick it up for that price? I have read that some early guns like this one don't run right and need some tinkering. I would think it would have to be a total piece of junk not to be worth $400. There is a shooting range at this shop and they will let me shoot it before I buy it. Any help will be appreciated.