$20.99 – LED Decorative Lights Copper Wire Light String Indoor Outdoor Holiday Garden Decorative Lights Christmas Lights USB Remote Control – Warm Light 9M 300LED.
I have just checked coupons. The lowest price I could get is $20.99 for LED Decorative Lights Copper Wire Light String 9m (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Banggood ($20.99)
Banggood warehouse is located in China. Coupons for LED Decorative Lights Copper Wire Light String 9m? Nope, there’re no coupons in Banggood. Low/high price? Well, this price is higher than average price ($14.99)
Link: Banggood product page
Price: $20.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGd9cae0
(probably won’t work, but you can try them out)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for LED Decorative Lights Copper Wire Light String 9m is here. The lowest price was: $11.99.
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)).