They don't come up for sale that often, especially in that condition. Two reasons (1) It wasn't a popular model in that era compared to most other models. (2) The older a knife is, the higher the attrition rate over time. I sold this one ~ 5 years ago for something like $1,700.00 if memory serves (Disclaimer: Sometimes it doesn't!):



They're not the same knives and it's not the same market. BUT, it should give you a general idea.

I'm curious: Can you describe the stone in the pocket?