According to my DB the lowest price is 19.99 USD for Outdoor Solar (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood (19.99 USD)
Banggood warehouse is located in China. Coupons for 2Pcs Outdoor Solar Light? Nope, there’re no coupons in Banggood. Is it expensive? Hmmm, price is higher than average (which is 8.82 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 19.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG91506f, BG589b2e
(you can check these old coupons out, but these probably won’t work)
Aliexpress
Click here… to search for 2Pcs Outdoor Solar Light on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 2Pcs Outdoor Solar Light is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).