I have just checked coupons. The lowest price I could get is $108.99 for HXJRC HJ816 PRO RTR Brushless RC Boat (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
HXJRC HJ816 PRO RTR 55km/h 2.4G Brushless RC Boat High Speed Net Ship Capsized Reset LED Light Speedboat Waterproof Electric Racing Vehicles Models Lakes Pools Remote Control Toys – Grey
Latest price update (UTC time):
Banggood ($108.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. Is it cheap? Pretty good price – average ($111.79) is higher than current one!
Link: Banggood product page
Price: $108.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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:
1. (8.11.2023, $97.99): BG7ab908
Item: HXJRC HJ816 PRO RTR Brushless RC Boat
Countries: Germany, Poland
Old coupons (from the oldest to the newest): BG4234a7, BGMatt2022, BG589b2e, BGAUGUST8, BG61af83, BG4452ad, BGCAPITALOS8, BGCOUPERT8, BGd83b34, BGRCCar5
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – HXJRC HJ816 PRO RTR Brushless RC Boat [EU] ($108.99)
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
Check out price history chart (for all/most countries) for HXJRC HJ816 PRO RTR Brushless RC Boat.
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)).