Larry,
In the past when I've bought a "money" double gun, as opposed to something common, I've had the dealer ship the gun straight to Kirk Merrington. I've heard some dealers aren't interested in doing business this way, but, Gary, at Osprey, was an example of a guy who had no qualms about doing this. I paid for shipping and Kirk's honest opinion. The gun I bought from Gary was an older MacNaughton, and Kirk gave the gun a clean bill of health. I used it for several seasons and sent it down the road.
If a dealer isn't interested in Kirk's opinion, at my expense, on a good double gun, he can keep it. I simply would never consider buying a gun, of any type, at an auction, of any type.
I only sold new Darnes, back in the day, and didn't offer a specific warranty, but, told customers I wanted to know if they had a problem. Had just a few problems with customer guns, that I always used and paid Kirk to handle. Never had a complaint on a board or to my face about the work he did or how I handled it.
Best,
Ted