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 (42.13 USD): BGMatt2022
Coupon (42.13 USD): BGToys8
(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): BGU25382, BG10RCVE, BG12RCCA, BGVehicles10, CouponsDE, BG00c906, ADMITAD2212, BGCityadsRC, Terence, Tabby20, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BG8OFFCOUPON, TTBLACK5
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Mofun 1027 1/24 6CH RC Excavator is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).