As much as I like my F1.7x AFAs, that IS nuts. I saw the auction when the bids were up to $5xx.00, and thought that was pretty crazy -- and there a few days to go. . .
IMO, this is a premium TC, add the AF conversion capabilities, and you've got something that is unique and worth a couple hundred $$, but it's very hard to justify more, especially used.
I guess if I hold on to mine for a while longer, then decide to jump ship (unlikely, and the only reason I'd consider selling them!), I could auction them off and finance a whole new system. . .:shock:.