Just check coupons out (with price alert and history). You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
2.4G / Brushless Motor / Built-in Water Cooling System / High Speed / Righting Function
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($167.10): Cuponation9
2. ($167.10): BgGoodie9
3. ($168.94): BG8ReviTrage
4. ($172.61): BG00c906
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): TTxBG10, 75d037, BG8FT011, BGss11, bgssaff9, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, BGFT011, BGVehicle10, BGFT011R, BGFT011US, BGUSFT011, BGFT011V, BGFT011RC, BGVehicles10, CouponsDE, ADMITAD2212, BGCityadsRC, Terence, BGRC011, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGJUNEGSG9, BGRCT10, BG417889, 9OFFSUMMER, BG47c31c, BGf1576f, TTBLACK5, BGd4e0fa, BGToys8, JanBGCoupon8, BGecfdf6
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – FeiLun FT011 RC Boat [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for FeiLun FT011 RC Boat is here.
Price records source(s): Gearbest, 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)).