Here's my track on the Model 36:
Smith & Wesson 36 Revolver in .38 Spl. Bluebook of Gun Values (31st Edition) indicates between $380 in 95% condition and $590 in 100% condition for this gun. I have 43 recorded prices for this model gun from $284 to $595 over a period of 2 Yrs 5 Mos ending July 7, 2010. The average price as of that date was $387. 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 $822.
Here's how the data charts out. Note that the Average Used Price
as of July trended at about $420. Better examples would command higher prices, especially with box, papers, tools, etc., this is a faily short track but the price trend seems pretty clear. Those little J's are becoming increasingly popular.