Update: gone] ASUS's ZenFone 3 Deluxe and Laser are now purchasable on Amazon in the US, but won't ship for a few weeks
Amazon.com: AT&T Zenfone 2E (AT&T Go Phone) No Annual Contract : Cell Phones & Accessories
Printfidaa The Almighty Printed Designer Hard Back Case for Asus Zenfone Max ZC550KL, Asus Zenfone Max ZC550KL 2016, Asus Zenfone Max ZC550KL 6A076IN Back Cover : Amazon.in: Electronics
Asus Zenfone 5 Smartphone Dual Sim Android Dual Core Intel 1Gb Ram 8Gb Rom white : Amazon.co.uk: Electronics & Photo
Amazon.com: Asus Zenfone 2E Z00D 8GB Unlocked GSM 5" IPS Display Smartphone w/ 8MP Camera - Black : Cell Phones & Accessories