I have a blue one that I bought new in 1975 while working for the sheriff Department. I think I paid about $225 and that might have included a small discount fro being a LEO. I have sense seen them at gun shows and at Cabelas gun library for about 1000 bucks. Yours being nickel might be a little more.
By faith Noah,being warned of God of things not seen as yet, moved with fear,prepared an ark to the saving of his house;by the which he condemned the world,and became heir of the righteousness which is by faith Heb.11:7