Here's my track on the model:
Smith & Wesson 19-3 2-1/2 inch barrel. Revolver in .357 Magnum,.38 Special, Plus P. Bluebook of Gun Values (33nd Edition) indicates between $325 in 95% condition and $550 in 100% condition for this gun. I have 54 recorded prices for this model gun from $395 to $795 over a period of 5 Yrs 6 Mos ending November 1, 2012. The average price as of that date was $550. No refurbs, no refinishes, regular sights. All represented as 95% or better. No distinction for 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 that the Average Price Trend is right at about $600 as of the first of this month, so the $600 price dan0583 is looking at is not unfair. Better examples of the model would command higher prices, especially with box, papers, tools, and so on.
Also note that the monthly price count is increasing at the same time. I take this to be indicative of folks who own the model are putting them up for sale to take advantage of the the appreciated value due to increased demand. Since the supply and the average prices are increasing, I'd say the end is not in sight and prices will never be lower (on average) than now.