Welcome to the forum. Good to see someone posting a pic.
Checked my "Fjestad's blue Book" values. Book is a few years old. Showed 100% or LNIB @ 4 bils. A 98% one in great shape @ 3 bills. A 95% one in good shape 250 and on down. I would agree with the others and say @ 3 bills for a nice one,give or take. I sold one like yours with similar grips in 90% condition a few years ago for 250. So it's knda a ball park figuer and also bases on availability. Not a whole lotta older used Rugers floating around here.
Picked up this Police Service Six with a 2 3/4" barrel in blue a couple of years after I sold the other one for 2. It ws in near perfect shape then, but no original grips.
