[Update on Article] This appears to be a copy of the original Skyler MiniCam and not the original Skyler MiniCam.
Typically the Skyler MiniCam stabilizers can be found for approximately $520-$540 shipped (as found here). There's one seller posting a unit that is a copy of the Skyler product and lists as an XMiniCam for just $399 shipped. The listing mentions that only 5 would be sold at this price, or until the end of December. You can find that listing via eBay (Click Here).
Skyler MiniCam XMiniCam Video Stabilizer