TZD has been around for over 10yrs now, I don't think ebay has changed them much, or that they have influenced bidders on ebay. Prices did go up last year though. Although they did mail a newsletter prior to the rise explaining it. I believe they were asking $149 for the Express prior to the price jump. Even at $179 it's still not bad for new unit.

They actually had new Turbo Duos until about a year or year & a half ago. I think it was minus the 3-1 disc though. I believe they were $179 prior to the increase, when the Express was $149. But they disappeared right about the time of the increase.