Aliexpress
Click here… to search for Diatone GTB 229 Cube Finger Version RC Drone PNP Nano2 on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (108.89 USD): bGhOnEy10
Coupon (108.89 USD): BGdragonBoat
Coupon (108.89 USD): BGAFF10OFF
Coupon (108.89 USD): BgcLuBofErtA10
(CouponsFromChina.com tip: apply it 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): BGCITYADS2019, BGBF229, AFfbG10, BG229CUBE, bGpAnDacHeCk, BGVDay10%off, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Diatone GTB 229 Cube Finger Version RC Drone PNP Nano2.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).