Handled one at the Lewiston, Maine GS two weeks ago, as I have been looking for one as a gift for my brother.
The gun was listed as "Like New" (not even close) with a tag price of $575. The gun showed relatively heavy use, like an issue gun that had been carried for 10 years would show. Little scuffs all over and heavy carbon that had been incompletely scrubbed on the cylinder face.
My offer would have been about $375, and no way would I have gone above $425, and probably not even that high. Just couldn't bring myself to negotiate with somebody who would misrepresent so grossly.
I would go to about $500 for a shooter in excellent shape (i.e; some holster wear and clean.).
Hope this helps.