Aliexpress
Click here… to search for Baseus BSWC-P19 2 in 1 Qi 10W Wireless Charger on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (22.92 USD): BGXMI15
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGVDay10%off, 0e7f33, FBCOUPON1
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Baseus BSWC-P19 2 in 1 Qi 10W Wireless Charger is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).