Aliexpress
Click here… to search for HC-22 Ultrasonic Solar Animal Repeller on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (29.74 USD): 8Couponsde
Coupon (29.74 USD): MVC8SPRING
Coupon (30.07 USD): 2203ActiesNL
Coupon (30.39 USD): BG00c906
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BGXPDC28, 13f142, BGJUY214, BG10OFFAFF1, BGSE063, BGDQXP28, BANGGOODSD, BGDU1137, BGHWDR1, BGHWGR2, 00c906, BGAlerabat1, Terence, Tabby20, BGHome15off
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for HC-22 Ultrasonic Solar Animal Repeller? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).