I had a basically complete 9-speed group, a mix of 105 and Ultegra on my Surly Cross-Check frame. The components were showing their age, so I took a chance and ordered the Motobecane Fantom Cross Pro for $1000, swapped parts, then sold the old group on the new Motobecane for $740. For $260 or so I completely upgraded the drivetrain of the Cross-Check to mostly Ultegra 10-speed.
I took a chance buying the Motbecane - I could have very easily been stuck with it. And I got lucky with the buyer, he knew what he wanted.
On the downside, the Motobecane I ordered came with the wrong sized stem and cranks, so I'll have to swap those - that will be another $100 to $200 bucks, minus whatever I can get for selling the used parts on ebay or Craig's List.
Just wondering if anyone else out there has done this or thought about it.