Bushveld, I own and shoot a number of guns with barrels that thin or thinner. I do not get real worried until the get to .020. And those barrels I was told were pristine without any pits, roughness or even built in misses.
That was built near 6 pounds, 6 ounces, as a lighter weight 12, with 30" barrels. I doubt it had more than a .025-.030 barrels when brand new. More likely .025. And where is it thinnest? If not within the first 24" I do not care very much. I bought a double a couple years ago with "barrels below recommended thickness" and found out they were only thin in the last two inches, where some owner had the chokes removed. They ran .025+ up until the last two inches and were .017 &.018. I was assured that this gun would not disappoint and was in excellent condition. If it had more choke I would have kept going, I think. But I was told Teague chokes would most likely not be an option, so I was going to have a Skeet and IC gun which is a bit limiting. I shoot open choke guns, but love a bit of choke when I can have them. Long range shots are a thing I enjoy, even in Sporting Clays.
Battle, you must have good taste as well. Everything I bid on seemed to go for twice the estimate. In a past sale a gun I was bidding on went for seven times the high estimate. That tells me everybody saw what I thought I saw as a great gun. I did not see that much like that in this sale but what I did see was of a bit higher quality than the last couple sales I think. Good thing because it looks like the Sealed Bid Sale has a lot of very low value stuff in it. Ton of box locks and worn out hammer guns or 1100 field guns which will struggle to bring $125.00 but will cost you near a grand when you get them imported.
Well all my sealed bids are in, perhaps better luck in that sale. I still have a few accessories coming in and a oak and leather case so I will get an early birthday present.