You can create price alert here, copy coupons and view price 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 price update (UTC time):
Package Included, Control Channels 2 Channels, Certification FCC CE ROHS, Suitable Suitable for phone width is 67-88mm, Material ABS, bluetooth name Black Shark Fun Cooler Pro, Scale 1: 5
Banggood
Banggood warehouse is located in Hong Kong. You can get coupon down below.
Link: Banggood product page
1. ($57.66): BG34b4f9
put item in your cart and apply coupon code there 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): BGMHSF, BGAFF10OFF, BGBLSKC, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, 7d18f7, BgcLuBofErtA10, BGCuponation10, BG3XiSharkHK, BGHONEY2110, BGf69f39, 13f142, BANGGOODSD, BG85d5c6, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, 9OFFSUMMER, COUPONSDE1wk, BGcoupon8off, BGGutscheine, BG00c906, BG8OFFCOUPON, TTBLACK5
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Black Shark Phone Cooler Pro is here.
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)).