Smart Battery: 5100mah 17.4V, Flying time: 27 mins, 1080p version.
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
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. There is one great coupon!
Link: Banggood product page
1. ($381.29): bgssaff9
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): a0e1d5, aff7off, de64c2, c0ca83, 502C6B, xmau, a2d1d5, TTxBG10, BGMID4K, AFfbG10, BGMPB2020, BGAFF10OFF, BGTT10, bGhOnEy10, BGRCMI28, BGRC902, 7bcdf9
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 6 another warehouse/versions!
1. China – Xiaomi Mi Drone 4K Quadcopter ($-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
Check out price history chart (for all/most countries) for Xiaomi Mi Drone 1080p RC Quadcopter. 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)).