I bought a 2-1/2" and a 4" Model 19's at the height of the Obama shortages for more than the OP's revolver in question. So, I'd suspect the current asking price is reasonable as prices have come down a bit in the last year or so.
My 6" Model 19 purchased new around 1980 failed due to a cracked forcing cone after a steady diet of 158 grain full power loads for IHMSA Silhouette competition. S&W replaced the barrel on their dime but I have been cautious with my Model 19's since.
These days, I load ammunition for my 357 magnum revolvers with 158 grain SWC bullets loaded to about 950 fps from a 4" barrel. These are comfortable to shoot and not high power that risk damaging the revolver.