Prices on all non-lock Smiths are rising. I managed to buy a 66-2 for $340 a few months ago, but it was a 6" barrel not the way more rare 3".
Remember that gun prices are regional and where certain guns may be less expensive in one local, in another they can be quite a bit higher. I have made some super deals here in Reno, but when I lived in the Peoples Republic of California, I rarely saw a revolver sell for what I have been able to pick them up for here.
$450 OTD with the original sights was a more than fair price for what you got. I would buy them all day for that price regardless of what others say.