Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (59.99 USD): BG50TF75X
Coupon (59.99 USD): BG50TF75X
Coupon (107.99 USD): bGhOnEy10
Coupon (107.99 USD): BGdragonBoat
Coupon (107.99 USD): BGAFF10OFF
Coupon (107.99 USD): BgcLuBofErtA10
Coupon (107.99 USD): BG11PP12
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGST75, TTxBG10, BGss11, bgssaff9, BGWKFrog, AFfbG10, affbg10, BG25ST, BGWKST, 502C6B, BGSTA30, BGBFCR25, BGWKRC2, BGCITYADS2019, BGTFboys, BG0107D, BGVDay10%off, BG20STF, BGTinyFrog75X, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for SKYSTARS TinyFrog 75X Drone PNP? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).