Smart Battery: 5100mah 17.4V, Flying time: 27 mins, 1080p version.
Check coupons or create price alert down below. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($381.29): bgssaff9
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): a0e1d5, aff7off, de64c2, c0ca83, 502C6B, xmau, a2d1d5, TTxBG10, BGMID4K, AFfbG10, BGMPB2020, BGAFF10OFF, BGTT10, bGhOnEy10, BGRCMI28, BGRC902, 7bcdf9
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 6 another warehouse/versions!
1. China – Xiaomi Mi Drone 4K Quadcopter ($-3)
2. Hong Kong – Xiaomi Mi Drone 4K Quadcopter [HK] ($-3)
3. Europe – Xiaomi Mi Drone 4K Quadcopter [Fast-08] ($-3)
4. China – Xiaomi Mi Drone 4K Quadcopter [GWTR] ($-3)
5. China – Xiaomi Mi Drone 1080p Quadcopter [GWTR] ($-3)
6. Hong Kong – Xiaomi Mi Drone 1080p Quadcopter [HK] ($-3)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mi Drone 1080p RC Quadcopter is here. The lowest price was: $341.1.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).