Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (14.87 USD): e2bcea
Coupon (15.74 USD): 12blitzw
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
Check out price history chart (for all/most countries) for 3x BlitzWolf BW-TC1/2/3 1m 1.8m 2.5m Type-C Cable Black.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).