Aliexpress
Click here… to search for 2.4G 1/20 RC Truck on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (38.94 USD): BGRCCar5
(CouponsFromChina.com tip: you should apply the coupon 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): BG4f7e7f, BGToys8
(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 2.4G 1/20 RC Truck? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).