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 (174.26 USD): MVC8SPRING
Coupon (174.26 USD): 8BGwbg2204
Coupon (178.05 USD): BGRCDrones6
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): K13010, K13012, XKK130, 502C6B, AFfbG10, BGAFF7OFF, BGAFF10OFF, bGhOnEy10, BGXYO15, BGXK12, BGTSU15, BGSS10%SW, bgshOOp10, BgcLuBofErtA10, BGJPXK217, BGCuponation10, BGJP12K130, BGDAVIS, BGHONEY2110, BGHeli432, BGMATT7, Drones6, BANGGOODSD, 6GSGIT, CouponsDE, 00c906, 2022ACTIESNL, Tabby20, BGheli3
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for XK K130 RC Helicopter RTF? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).