Just check coupons out (with price alert and history). What is best price?
Working temperature: -20℃ To 50℃, Waterproof: no, Output Power: 24W, LED chip: 5050, Length: 5M, Luminous Flux: 14LM/LED, Emitting Color: RGB, LED Quantity: 30LED/m, View angle: 120°, Working voltage: DC12V
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 Europe 
. I don’t know if this is a good price – number of records in my database is too low! There is one great coupon!
Link: Banggood product page
1. ($13.99): BG589b2e
this code has to be applied in your cart 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): BGLIG12, BG10OFFAFF1, BANGGOODSD, 00c906, BG00c906, ADMITAD2212, BGLED2203, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGf94f14, BGLED2206, Cuponation9, 9OFFSUMMER, BGLED07
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Not enough data to show price history chart… $7.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).