B&H also has the Rokinon 8mm f/2.8 UMC Fisheye II lens for Sony E-mount, Fuji X-mount and Samsung mount for $249 (reg. $279). The 12mm lens is also available for Sony E-mount for $379 (same as above). Check them all out here at B&H Photo.
Note: This is likely a gray market item and may not include a US warranty. ebay seller quickndone has a positive feedback rating of 99.8% at the time of this posting.