In the interests of matrimonial harmony, I have agreed to part with an early 70s Gitane tandem in my garage. I'm asking $75 for it. Sorry for you list members outside the SF bay area, but shipping this is not a viable option (unless you are so hot for this that you can convince me otherwise). The captain size is about 22", the stoker is 21". The stoker part is a mixte like set up. Ask if you don't know what I mean by that. I'm certain about the stoker size, and I say 'about' for the captain size only because I haven't measured it. I ride a 58cm bike, I fit on this easily, the seat is not really, really high. I can give an exact measurement later.
The bike currently has upright bars, and stem shifters. I could be convinced to change that if I have the right parts available and would could negotiate based on that.