The Fujifilm GFX 100, released in 2019, was the first 102MP camera in the GFX system and the first medium format body with in-body stabilisation and on-sensor phase detection, built as an integrated-grip flagship for studio and commercial work.
It pairs a 102MP 44x33mm BSI CMOS sensor with X-Processor 4, 5-axis IBIS rated to 5.5 stops, phase-detect AF across the frame, a 5.76M-dot removable EVF, dual SD slots, 4K/30 video and a 1,320g integrated vertical-grip body running two NP-T125 batteries.
Its significance is making 100MP handheld work practical: IBIS plus PDAF removed medium format's tripod dependency. The later 100S packed the same imaging into half the size, which pushed used GFX 100 prices down and made it a resolution bargain.
Used GFX 100 bodies offer the cheapest 102MP route by far. Check EVF and grip connectors, confirm both batteries hold charge, inspect the port doors, and verify firmware is current since late updates added ProRes RAW output and improved AF.