Greek welcome to the forum, You have a nice rifle in that early Deerslayer.Prices vary allot depending on condition. I've seen them on Gunsamerica from 350.00 and up.Last year I bought a NIB from a friend for 300.00. It's not as early as yours is.But it's unfired with the box and all the paperwork.Unfortunately the box is showing age from storage and insects eating on it.I'm with OEH when he says the older ones are better then the new Deerfields.I'm not sure why Ruger would have discontinued them.Probably sales weren't what they had expected.You can also see when any Ruger was manufactured by going to www.ruger-firearms.com I forget exactly where it is on their site but you'll find it easily.Let me give another small piece of advice.DON'T post you guns serial numbers on this or any other site.For security reason you're better off not mentioning the S/N's If you want to give a range use X's
Eg 1234xx G2146xx.
Ruger Redhawk