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 (131.99 USD): BG8ed2c9
Coupon (137.99 USD): BG9d9a5d
Coupon (142.49 USD): BGRCCar5
(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): BGMatt2022, BG589b2e, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8, BG5RCCar
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Flytec V801 RTR 2.4G 4CH Fishing Bait RC Boat is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).