Here's what I've go on the 19 snubby.
Smith & Wesson 19 2-1/2 inch barrel. Revolver in .357 Magnum,.38 Special, Plus . Bluebook of Gun Values (33nd Edition) indicates between $325 in 95% condition and $550 in 100% condition for this gun. I have 50 recorded prices for this model gun from $395 to $795 over a period of 5 Yrs 4 Mos ending August 24, 2012. The average price as of that date was $548. 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 $457.
Here's how the data charts out (note the chart is four prices behind the data). The Average Price trend was pushing hard at $600 as of July. Better than average examples would command higher prices. Using these data, a top price for something like you have, might easily trip between $740 to to about $830. You might have to wait for that level of pricing should you decide to sell it soon.
What's interesting to me is the number of guns coming on to the market is growing along with the prices. So Model 19 owners are, apparently, taking advantage of the appreciated value the demand is inducing. I'd expect the appreciation to continue, especially if the number for sale levels or begins to decline.