Yi Technology via Amazon has the Yi Gimbal 3 Axis Handheld Stabilizer for Action Camera 4K and 4K+ (Gimbal Only) for $144.99 w/ code TIKKR4BQ.
If you purchase a Yi 4k Action Camera- Black ( $189.96) or White ( $183.93), the Gimbal will be $99 w/ code JM86COUQ.