Used C-arm fluoroscopes are typically the most expensive line in the surplus market. The flat-panel-vs-image-intensifier choice and last radiation calibration drive much of the price spread.
Across 7 tracked c-arm / fluoroscopy models, complete-system medians range from $1,750 to $77,900, with a cross-model median around $3,000. Individual models vary — see each model's page for its own comp-backed price.
Detector type (flat-panel commands a large premium over image-intensifier), tube/generator hours, software level, and whether the table and monitors are included.