I've been watching this machine and thought the same.
My personal thoughts (await the blasphemy): I'd rather put the money into a DMD game with all the toys for $3500. Yes, I'd like a Captain Fantastic in the collection, but at the moment I'm after other titles.
Maybe the demand for the older games is dropping as the ones hunting them down for their collection have already sourced them? KISS was another title that always seemed to sell on ebay. Now I see them sit between $4000-$5000.
Cheers!
Adam.