Underrated Bally with it's flipper configuration. Artwork is typical for this era. Backglasses are usually in very good condition, but the playfields can be very worn and tired. The last reasonable working machine I saw went for $1200. Reconditioned and working - I'd say $1400 to $1600.

Be good to pick up a project machine for say $800 with a tired playfield as CPR are reproing these.