According to my DB the lowest price is $6.59 for Remote Control RC Boat Toy (in Banggood). Check coupons or create price alert down below. Do you want to know what the best price is?
Remote Control RC Boat Speedboat Water Remote Control High-speed Rowing Toy Tough Endurance Water Boy Speedboat Gift – Blue
Latest coupon code price check (UTC time):
Banggood ($6.59)
Banggood warehouse is located in China. Low/high price? I have never seen better price than the current one in CouponsFromChina database, so it’s the best! Basically there’re 2 active coupon codes available!
Link: Banggood product page
Price without coupon: $10.99
1. ($6.59): BG624e09
2. ($10.44): BGRCCar5
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMatt2022, BG589b2e, BG5RCCar
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Remote Control RC Boat Toy.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).