On his blog, Lloyd Alter recently announced that he is selling his Sustain miniHome prototype.
model: miniHome SOLO
designer: Andy Thomson of Altius Architecture
manufacturer: Sustain Design Studio
size: 350 sf
See the post for 3 interior photos and contact information.
For those who don't recognize the name: Lloyd writes for Treehugger, sharing some of his prefab expertise.
size: 324 sf
Worth a look: the listing includes 7 more pictures.