Titanium Ploprof - fair price?

What is a fair price for a used titanium Ploprof? By used I mean has some desk diving scratches but is in generally great condition with box and cards etc. I ask as its been difficult to nail down in my research and there are not too many on the market. I see prices all over the place on chrono24 and I don't particularly trust asking prices on there anyway. Apologies if I am in the wrong section.

It really is simple. What you are willing to pay is the fair price.

If you don't buy and someone else does, that's empirical evidence. If you don't buy it, waiting for a lower price, and no one else does; you made the right call. Wait it out until you can't wait any longer, or someone else may be quicker on the the draw.