Aliexpress
Click here… to search for RAINPOINT Sprinkler Water Timer on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG46ab76, Cuponation9, BG1379ea, BG8460a1, BG60e8b8, BGc99e95, BGb2dc15, BG357e45, BG8ReviTrage, BGGutscheine, BG00c906, BG8OFFCOUPON, TTBLACK5, BGdbe184, BG589b2e, BGf625a4, BG23ALEAprD, BG081591
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for RAINPOINT Sprinkler Water Timer.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).