The Fujifilm GX680, introduced in 1989, is a 6x8cm medium format studio SLR system with front standard movements - rise, fall, shift, tilt and swing - unique among roll-film SLRs and effectively a small view camera with reflex viewing.
It shoots 6x8cm frames on 120/220 roll film with interchangeable EBC Fujinon GX lenses from 50mm to 500mm, rotating backs, waist-level or prism finders, and battery-driven film transport. The body alone weighs around 2.5kg - this is tripod equipment.
The front movements are the reason to own one: perspective control and plane-of-focus adjustment for product, architecture and portrait studio work that no other roll-film SLR offers. Later GX680 II and III revisions refined electronics and reduced weight slightly.
Used kits are remarkably cheap for the capability, but check the bellows for pinholes, confirm the battery pack or adapter is present and working (the camera is inert without power), test back rotation and film advance, and budget for the sheer bulk in shipping.