Today I printed off photos from the ebay ad and took them to my lbs (95% df, 5% bent - sun dealer). The mechanic there said that Trek tried the mid-drive system and then gave up on it due to problems. He said he would probably steer clear of it, especially with the sachs components which are no longer made. I said the Rotator Pursuit is known for being a well-engineered product; I would just need them to be able to work on it. He said they'd do it, no problem there, but once a sachs component goes bad, you start looking at replacing the whole drivetrain which involves a lot of parts on this model. I'm sure some well-seasoned bent folks would have some ideas, but I will pass on it. This mechanic then steered me towards a Sun Tomahawk. Surprise. No thanks.