Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Thruster size 114x100x100mm, Shell material PC plastic, Rated voltage 24V, Rated current 17A, Material of adapter Stainless steel, Model TD6E, Product name Booster, Rated power 400W, Size of adapter 135x42x40mm, Thrust range 0-7kgf, Endurance time High-speed 30-40min; Low-speed 1-2h, Thruster weight 550±20g, Speed 3-7km/h / maximum speed 7km/h, Waterproof level IP68
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
DD TD6E 24V Electric Surfboard Underwater Thruster Brushless DC Motor 400W for RC Boat Electric Rubber Boat / ROV Thruster | $376.69 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($183.99): BG8OFFCOUPON
2. ($187.99): BG00c906
this code has to be applied in your 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): BGissam15wts, BG073996, BG369949, BgGoodie9, BGc363fd
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for TD6E 400W 24V RC Booster Underwater Thruster with ESC.
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)).