I was considering pre-ordering it because Amazon currently has the 600 II listed for $11,999 instead of the $12,999 it's suppose to be. Does anyone know if Amazon actually honors that pre-order price, or could I expect my order to be cancelled before release if I did pre-order the lens? I know they had the 300 II available for pre-order at $6599, but then took down the ability to pre-order about 2 months before the actual release.