Quote Originally Posted by Biciclista View Post
it wasn't a real mixte (only one "top tube") but it sold for $380 !!!
Yes, it is a real mixte. The top tube doesn't matter, it has three seat stays. I've seen these every once in a awhile. I think Motobecane even made one at some point.

From Sheldon:
A variant on the mixte uses a single, full sized top tube running from the upper head tube to the seat tube, but retains the middle set of stays.