$450-550 is about what they go for here. If yours was made in '82, it is a 66-2. To put it in perspective, I bought a 66-2 4" at a gun show in February for $375 that was in good shape, didnt have the original grips, but had a nice set of Pachmayr Grippers which are great to shoot. The 2 1/2" barrel ones seem to go for a little more.