I would challenge as the difference is excessive
I have gambled on gunbroker, gunsamerica, and gunsinternational
Most guns dealers do not seem to actually understand sxs guns
Half dont understand refinish, and many are horse dealers in the worse tradition.
I once brought a 14 gauge BLNE and what arrived was a 20 ga, looking back on it if i did a better job reading the photo i would have caught it. After i got the gun back on face by Terry Nichols its ok and I won't lose much.. But that said if it had had the issues you describe it would have gone back.
Looking at the fuzzy photos was the tell in hindsight, either a fool or a crook.
I have only backed out of a gun deal once ( with a member of this board too) and I can say he was a gentleman and was good about it. Moreover that lead to me later buying a gun from him that I still have.
Life is not full of such guys, they are more like the ones you are dealing with
