If it is minty, that is an OK price. I have seen minty USFAs, with Uberti parts, with price tags in the $800 to $900 range. (I can't say they SOLD for that much.) I would rather own a new all-USA-made USFA Single Action, at about a grand, drive-out, than a pre-owned Uberti-parts USFA in the $800 range, but would certainly consider one in the $600 range, if it had a smooth action and the EXACT grips that pleased me. I happen to really like the hard rubber (plastic-like) grips that are standard on USFA sixguns.
To be clear, I am no authority on pre-owned USFA prices, just sayin' what prices would make me pay attention. I did very nearly layaway a particularly nice USFA, which had a Uberti barrel, at least, but the $900-ish price was just too much, and the dealer would not negotiate far enough unless I was willing to buy outright. This sixgun had what appeared to be factory-installed eagle grips, which I really liked.
BTW, no USFA, or Colt SAA, is minty if the there is a turn ring around the cylinder, at the bolt notches. That is going to be an ABUSED gun, or one that had bad timing of the internal parts, which a previous owner failed to notice. Turn rings are normal on Ruger single actions, but not on sixguns with the traditional SAA-type lockwork.
FWIW, I own a USFA sixgun from about early 1997, which is marked U.S. Patent Firearms, an earlier name for USFA, when all the parts were Uberti, and those parts were assembled under the Dome, in the old Colt factory. It is NICE, far above the Italian sixguns imported at that time.