Just check coupons out (with price alert and history). Best price?
Color 16 million RGB color, Charging port “USB（SL1）
Adapter（SL2 / SL3）”, Output Voltage “5V / 1A（SL1）
12V / 1A（SL2）
12V / 2A（SL3）”, Usage scenes Living Room / Kitchen / TV / Party, Input Voltage “USB input（SL1）
100 – 240V（SL2 / SL3）”, APP Gosund / Google home / Tuya, Length 2.8m（SL1） / 5m（SL2） / 10m（SL3）
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG5db600, BGGOS924, BGD11032, BGB5041, BG3b30e6, BGc793fa, BG1382ba, ADMITAD2212, BGSmart6, BGAlerabat1, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BG5ddd8a
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Gosund Smart Wifi LED Strip Light RGB 5m SL2 [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Gosund Smart Wifi LED Strip Light RGB 5m SL2.
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)).