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 (47.67 USD): BGHBX1885
Coupon (52.44 USD): BGApr12pro
Coupon (53.63 USD): BGAFF10OFF
Coupon (54.59 USD): 7d18f7
(CouponsFromChina.com tip: apply code in your basket (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): AFfbG10, affbg10, 502C6B, BGCITYADS2019, BGVDay10%off
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for HAIBOXING 18859E RC Truck RTF.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).