Price history, coupons and price alert are available on this page. 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 and price update (UTC):
Motor: 300 watt, Battery charging time: about 4-5hours, dual speed, Speed: about 4.5-5.5km/h, Item name: underwater scooter, Color: yellow, 24VDC, Battery: 6000mAh 24V, Max thrust: about 12kg, Running time: about 25minutes Item size: 59.7x 37.2x 31.1 cm, Max depth: about 30m
Banggood
Banggood warehouse is located in Europe 
. I don’t know if this is a good price – number of records in my database is too low! Only one coupon available!
Link: Banggood product page
1. ($159.99): BG598895
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGissamSeaScooter, BGmotorinoScooter, bgshOOp10, BGsea001, BGRC902, bGhOnEy10, BgoFErTaSchInA10, BgcLuBofErtA10, BGIssSUB, 7bcdf9, BGAFF10OFF, BGSCOOTER3, BGCuponation10, BGHONEY2110, BGfe8a0d, BGVehicle10, BGVehicles10, BG10RCVE, BG12RCCA, CouponsDE, BG00c906, ADMITAD2212, BGCityadsRC, BGScoter, Terence, Tabby20, BG1efeb0, 8Couponsde, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, BGc69983, Cuponation9
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Waterproof Electric 300W Underwater Sea Scooter ($-3)
Price history and price alert
There is only one database record (it was for $159.99), so you can’t see price history chart.
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)).