As far as I can tell, the price is below average for what looks like—after a bit of clean & polish—an above average example of the model, especially pinned & recessed. Here's what I have for a track:
Smith & Wesson 66 2-1/2 inch barrel. Revolver in .357 Magnum,.38 Special, Plus P. Blue Book of Gun Values (35th Edition) indicates between $561 in 95% condition and $754 in 100% condition for this gun. I have 80 recorded prices for this model gun from $436 to $1103 over a period of 3 Yrs 7 Mos ending July 5, 2015. The average price as of that date was $695. No refurbs, no refinishes, regular sights. All represented as 95% or better. No distinction for import location or engineering revision, if any, no special editions, no distinctions for box, papers, tools. Current or last MSRP is $614.
The last 10 prices I have for this model since 2/10/2015 range from $600 to $975 averaging $743, so the average is clearly climbing.