ebay (via GetItDigital) has the Zeiss Sonnar T* FE 55mm f/1.8 ZA lens for Sony E-Mount cameras for $699 (reg. $999) in limited quantity. The last time they had this lens at this price, it didn’t last long. Check it out here on ebay.
Note: This is labeled as a gray market lens. ebay seller GetItDigital has a positive feedback rating of 99.6% at the time of this post.