It's still hard to find a Nexus 6 in stock even months after it was released. That's even more true if you fancy the "cloud white" version. Not only does Expansys USA have the device in stock, it's on sale for $604.99 with free shipping.
If you manage to catch the Nexus 6 in stock elsewhere, the list price is $649.99 on the 32GB variant. Saving $45 on a device that's still in high demand is nothing to sneeze at. Expansys' shipping will be a little slower than Motorola, but it's free. You only have to pay sales tax in Illinois and Canada (no free shipping to Canada, though).
Expansys doesn't yet have stock of the 64GB version in either color or the blue 32GB. This deal is only valid today, so don't think about it for too long.