A nice Ranger 117 from Eidos, everything is metal except the seat and arm pads, which are available from Eidos for I think about $200 total. And new ones of these are north of $2000 now. Dusty and pads have wear, but otherwise 100% functional. Shipping not included but it can be arranged by the buyer.
The Model 117 Ranger from Eidos is a fully adjustable work station constructed of steel for years of tough industrial service. With a foot-print approximating that of an office chair, the Ranger is well suited for the types of demanding manufacturing and maintenance environments that often destroy a lesser product in short order. Not just a better idea- the Ranger was designed at the request of several Fortune 100 manufacturers who desired a safe work station, with adjustable range of work height, comfort, and durability, all in a cost effective package.
Seat back tilt range: 85 degrees
Seat dimensions: 19.75 inches by 15.50 inches
Base length: 31 inches
Base width: 26 inches
Seat height range: 18 inches to 30 inches