Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – MJX Bugs 3 Pro B3PRO Drone 1080p 2 Batteries (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (125.99 USD): bGhOnEy10
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 502C6B, 828751, AFfbG10
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – MJX Bugs 3 Pro B3PRO Drone 1080p 2 Batteries (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for MJX Bug 3 Pro B3PRO Drone 720P 1 Battery.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).