Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Light String Length: 7M/23Ft, Power: 3W, Light Color: Warm White / Cool White / Colorful (Optional), Waterproof Level: IP44, LED Beads: 50
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($10.33): BG589b2e
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGLED2206, BGLED07, Cuponation9, BG00c906, BGOct22LED, BGLEDNOV2022
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for 7m 50LED Solar String Fairy Lights Waterproof? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).