Motorola is also sold out of the Nexus 668
We do know that the Nexus 6 will eventually find its way to the major U.S carriers. A leaked internal memo from the T-Mobile camp confirms that the device will be hitting John Legere's crew starting on November 12th. The 32GB model is $649 while $50 more will buy you the 64GB variant.
This is Motorola's first crack at producing a Nexus handset. Previous manufacturers included HTC (Nexus One), Samsung (Nexus S, Galaxy Nexus) and LG (Nexus 4, Nexus 5).
source: Motorola via AndroidCentral