I have checked all old coupons and price is 15.99 USD for 2.4G Mini RC Boat (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood (15.99 USD)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Is it a low price? Awesome! This price is the best in CouponsFromChina database!
Link: Banggood product page
Price: 15.99 USD
15.99 USD – This is the best price ever noted in my database!
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Coupon (27.7.2023, $17.99): BGXIFD1116
Item: 2.4G Mini RC Boat Submarine
Countries: CzechRepublic, Hungary, Slovakia(SlovakRepublic), Slovenia
Old coupons (from the oldest to the newest): BGMatt2022, BGbd0cfe, BG589b2e, BG5RCCar, BGRCCar5
(probably won’t work, but you can try them out)
Aliexpress
Click here… to search for 2.4G Mini RC Boat Submarine on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 2.4G Mini RC Boat Submarine is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).