Sur le site US de Canon il est annoncé pour décembre

Pricing and Availability
The EOS 6D Digital SLR Camera will be sold in a body-only configuration at an estimated retail price of $2,099.00 and it will additionally be offered in a kit version with Canon's EF 24-105mm f/4L IS USM zoom lens at an estimated retail price of $2,899.00. Both configurations are expected to be available in December 2012.