Best Buy through eBay has the Feiyu SPG Plus 3-Axis Gimbal for Smartphones and GoPro for $99.99 (regularly $299.95) with Free Shipping for a limited time. B&H Photo also has it for the same price with Free Free Shiping for a limited time.

The Feiyu SPG Plus features slide-bar balance system that optimizes the alignment of various phone sizes and GoPro cameras, up to one-second exposure for low light use and up to an eight-hour run-time.