Depending on barrel length which 6" would be less than 4 or 2 1/2, I would say $450 in this area. I see lots at the gun shows but only 19's south of $500 sell regardless of dash.
At the end of the day, it's a 19-5 made of spare parts leftover. Nothing really worth more than any other 19-5. 19-5's for whatever reason also have the worst stigma of forcing cone cracks.