Well, in the same "fix", I'd likely sell the Moulton. The Moulton you'd have left is a an even more unusual model, and it has a better wheel size for a road bike. Also, the Friday will be an easier bike to maintain in the long-run, with the factory just a days drive up the road from you.

The Bike Friday looks like a Crusoe or Pocket Rocket based upon the lite weight, 'straight' brace connected to the frame and down tube, just above the bottom bracket. It would cost $2,000+ to replace with a new one, as equipped. The bar tape is a bit garish to be sure -

The Moultons are pretty expensive (and unusual) to be out there beating up on a regular basis - besides, as a collector of folders, I think variety is nice. If interest rates pick up someday (and we have any money left), I'd consider a TSR2 or TSR8.

A couple of questions: Are you running out of space for bikes? Is the family questioning your sanity? What is real reason for selling off one of them? (If it were just $, you'd be looking to unload all of them, IMO.)

Lou