I will never buy another gun at any of the auction sites. Over the past 5 years I have bought guns at both GB and Auction Arms and have been burned on the butt.
I bid on a 1917 Enfield and had the high bid. Because the auction ended on a National holiday the bid on the no reserve auction was very low and I thought I had a real bargain. I forwarded a signed copy of my C&R to the seller along with a Postal Money Order. The seller returned the MO and said the reason was they couldn't "read the expiration date on the C&R." I never did get the gun
My father gave me a shotgun for my 14th birthday in 1956 it was a Model 20 JC Higgins. That gun was stolen while I was overseas in 1969. I found one at one of the auction sites and bought it. Although it was listed as in "excellent" condition and the outside looked great, when I actually got it the working parts were all rusted and the gun could not fire.
I have bought C&R pieces from J&G, AIM, SOG, and Century Arms and have never had a single problem. Just my .02.