http://www.amazon.com/gp/product/B00R1984DI?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_
if this is the one your looking at. Make sure its shipped and sold by amazon. US Warranty. When you receive it the model number on the box should be XT1103 thats the US variant thats unlocked for all carriers. If you buy from a seller thats not amazon it may not be the one that works on verizon. Some sellers sell the international version so watch out.
You're saying this: http://www.amazon.com/Motorola-Unlocked-Cellphone-Midnight-Warranty/dp/B00R1984DI is the international model? From what I can tell of the comments is that it's the US model.
It was this one, but of course Amazon doesn't have any left so it shows a different seller. On my orders page it states:
Delivered Dec 23, 2015
Your package was left at the front door or on the front porch.
Motorola Nexus 6 Unlocked Cellphone, 32GB, Midnight Blue (U.S. Warranty)
Sold by: Amazon.com LLC
$249.99
Condition: New
Amazon currently has them on sale: http://www.amazon.com/gp/product/B00R1984DI?ref_=gbps_img_s-3_5162_ff52e10d&smid=ATVPDKIKX0DER
Both the white and blue 32GB are in stock sold by amazon. http://www.amazon.com/Motorola-Nexus-32GB-Unlocked-Midnight/dp/B00R1984DI/ref=sr_1_4?ie=UTF8&qid=1424629610&sr=8-4&keywords=nexus+6