I think everything that is film related in camera gear is priced really high right now. It might be cyclical and the prices may come back down. There seems to be a wave of nostalgia or something that is causing folks to buy old film gear, and so the prices reflect that. Fifteen years ago and even up to a few years ago, you could barely give away film gear, but now everything is selling for much more than I think it's worth. So, good time to sell, bad time to buy.
Best,
-Tim
PS: Follow up on what Raid is saying, now that so many lower budget movie projects are being shot on digital, cinematographers are trying to capture the feel of film, and one of the ways they're trying to do that is to use old vintage film lenses. I was working in that business in the early 2000's and had purchased a complete set of Cooke Speed Panchro lenses from the 1950's & 60's. I spent a total of less than $2500 for the complete set of six Series III and Series II lenses all in pristine condition. In 2012 I sold the set for $7500 (which I thought was incredible) to a cinematographer who was using them with the RED series digital cameras, again, trying to get that "film look". Well now they're going for $25,000 - $35,000; if you can even find a complete set. The prices are pretty ridiculous.