That thread was about a different blue Rambouillet on Ebay- that auction is over.
This is a new auction- a much smaller Rambouillet with 26" wheels. Different bike.

Rambouillets come in 50cm frames, 52, 54, etc. (except that they are not making any more of them for now)
FWIW: My inseam is 32" and I ride a 54cm Ramb. I would probably be comfortable on a 52cm as well, since my 54 is "almost" too big. A 56cm would be too big for me.