Dahua International does not sell directly in the US, yeh gotta import em..
Dahua USA will get comparable models, but many months later and for significantly more moolah.. B&H Photo is an authorized US Distributor for Dahua USA
Andy - $128 DHL SHipped -
Aliexpress.com : Buy Dahua IPC HDW4231EM AS 2MP IR Eyeball Network Camera. free DHL shipping from Reliable network camera suppliers on BEC Technology Co.,Ltd
B&H Photo - $213 Shipped from US -
Dahua Technology Pro Series 2MP Outdoor Network Eyeball N24BG53
With the cost savings of importing it ($85) you could just spend a lil more ($40) and have a backup sitting on hand which is better than any warranty.. If your needing multiple cameras then its easy to have a spare camera and still be much cheaper than buying US Domestic models directly.
My Black Face Dahua PTZ is still running fine 4 years later and I paid a bunch extra like an idiot from a US Distributor so I could have a 1 year warranty.. never used it, didnt need it and its going to be replaced soon not because it failed, just because it got too old and the new starlight tech is sooo much better.