Minimoog Model D - going rate 2022?!

I’m currently in luck and have the chance to locally score a an 5 Digit Serial Model D. The Synth is optically in a great condition, with only minor repairs that ought to be done…
Pitch wheel is a bit sketchy, Pulse waves seem to make some problems and of course the obvious tuning issue ^^

We haven’t talked about a fixed price, the seller is aware of current pricing but also knows that at least some work is needed…
What would my fellow elektronauts throw into the ring for first negotiations?

A friend of mine sold his in the summer of 2019 for CHF 4500.-
It was in very good shape.
The poly d had been announced but not released yet.