>>I looked up a chart of C/Y lens performance at the following link and the rating for the 85mm f1.2 is poor...it's at the end after the zooms, and well down on the 85 1.4...I remember the fuss over the Canon 50mm f1.0 L lens and it didn't perform that well wide open if I recall rightly...but it was touted as the fastest lens available and that appeals to some.<<
Well, I prefer to *use* lenses rather than rely on tests from a non-existent link. I'm fortunate enough to have used an 85mm 1.2 and it is very good, trust me, certainly the sharpest of the Zeiss 35mm lenses that I've used...it makes the 85mm 2.8 (a very good lens) look like a third party lens thrown in with a Canon Rebel at Ritz Camera, and it's certainly superior to any zoom I've used. It is softer wide open, but so is just about every Zeiss lens I've used that is 50mm or longer.
Whether any lens is worth over $2000 is another question, and indeed, I'd recommend a medium format system for most people, rather than a pricey lens that for all its magic still produces an image on a tiny negative. And if portable and affordable are desired while retaining damned good sharpness and contrast, a Contax G2 and two or three lenses is an outstanding choice.
But with that said, the cold reality is that lenses like the 85mm 1.2 are rare, and if you spend $2K+ on the lens today and auction it tomorrow, next week, next year, or next decade, it's likely to sell for the same amount or more unless you've taken very poor care of it.
I actually think the 85mm 1.2 is somewhat "reasonably" priced for a limited availability lens, given the prices that some other lenses fetch, both new and used from Contax, Nikon, and Canon...not to mention the big L. If you want to see a rare lens that does fetch stratospheric prices, check out the current eBay auction for the rarely seen 200/2 Aposonnar:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=2958885159&category=21965&rd=1