Double the sticker price?
I bought one bottle of that Muskateller baby-Eiswein in Chicago (one of those oddities hidden in the back of Howard's Wine Cellar about) for about $15 a year or two ago and loved it. That was a gorgeous wine - if the Eiswein was seriously *that* much better and only twice as much, I'm in awe.
I definitely do need to give Darting more regard (although his wines don't show up that often)... the stuff I've had from him has ranged from really solid and consistent while really cheap (his 1L Kabinett bottling in 05) to seriously stunning (the Muskateller above and the Scheurebe TBA you opened for me a few weeks ago), and I've never had a wine from him yet that I didn't enjoy, or one that gave me second thoughts with regard to pricing.