Just check coupons out (with price alert and history). Do you want to know what the best price is?
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 and price update (UTC):
right, Motor: Brush, Brand: Flytec V007, Model: V007, backward, Frequency: 2.4G, Charge time: 1.5-2h, Package size: 58*30*22 CM, Weight: 2330g, left, Function: forward, Battery: 2XAA battery(not included) 4.8v 5200mah battery, Using time: 4h, Proportional control: Yes Size: 54*26.5*18.5CM, Speed: Max 4.8km/h Servo: brush, Control distance: 500m
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($116.79): BGAFF10OFF
2. ($116.79): bGhOnEy10
3. ($116.79): bgshOOp10
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): BGV007BOAT, BG20OF681, AFfbG10, BGFLYB, BGTEC071, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Flytec V007 500m 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)).