A nickel 19 as you describe would bring $550 to $600 locally - IF - you could find one.
A torn up 19 at local gunshows is never tagged less than $500 lately.
The honey holes are drying up. Nice 19's are getting scarce. Eleven years of production of lesser, cheaply made revolvers, with higher MSRP's, is driving the price of nice model 19's ever higher. The days of the $1000 model 19 are probably not as far off as some would have you believe.
But it, shoot it, love it. There won't be anymore as nice as that 19 made. Good luck! Regards 18DAI
S&W Model 19 Combat Magnum. Everything you need in a revolver, and nothing you don't.