Aliexpress
Click here… to search for FS Racing FS-53692 RC Monster Truck on 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 (267.77 USD): BGCAPITALOS8
Coupon (276.50 USD): BG5RCCar
(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): BGFS53692, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, 2880c7, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, 7bcdf9, BGCuponation10, BGHONEY2110, BGVehicle10, BGVehicles10, BGMatt2022, BG589b2e, BGAUGUST8, BGCOUPERT8
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for FS Racing FS-53692 RC Monster Truck is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).