Wimberley WH-200 Version II
The Wimberley WH-200 Version II is a solid, professional gimbal head designed for long telephoto lenses: it'll hold up to 45kg, which should be enough for almost anything. In excellent condition, with minor cosmetic wear. Locks are excellent, and movements are smooth. The integral clamp is Arca-compatible; camera plate is not included. Heck of a head.