For those mainly interested in the 100mm lens, the best bargain is to buy a cheap Fuji G690 (the first model) with a damaged darkslide. The darkslide is used to protect the film when changing lenses, so you won't be able to do lens changes when there is film inside the camera (except by using a changing bag). But if you later acquire an additional lens, you will still be able to do lens changes between rolls. And don't forget that a 120 roll is only 8 exposures...
This trick won't work with the subsequent models (G690BL, GL690, GM670), as there is an interlock to prevent lens removal when the darkslide is open.
Cheers!
Abbazz