Below is the first specifications of Samyang 135mm F2.0 ED Lens for Canon EF Mount on eBay.  The price of this new lens is GBP 374.99 (Approximately US $568.09).

We are told Samyang will soon announce 135mm f2.0 ED Aspherical lens before CP+ 2015. This is a full-frame lens and the rumored price is about $570.