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 (163.79 USD): BGa7620c
Coupon (172.89 USD): BGRCCar5
(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): BGAUGUST8, BGJULYTAZSNT, BG5RCCar, BGCAPITALOS8, BGCOUPERT8
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Diatone SNT 12007 Q38-T1 Q-Series 1/100 FPV Micro RC Car.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).