2 chassis pre-production version of the well reviewed 9.0 preamp that went out to Dan's beta testers. I was one of them, and this isn't the unit I originally had, but they sound good enough for the money that I've had 3 Betas and 1 full production unit in my system over the years. To my ears it gets you most of the way to the performance of the production model for 1/2 the price. Asking $550 shipped. I'll cover paypal at my asking price.
At this price I'll also include the Revelation Audio umbilical cable that Dan recommends as well as the stock umbilical and PC. Retail price of the Revelation umbilical is $249.