Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Beam angle: 140°, Light color: RGB, Length: 2M, Working humidity: 0%-95%, Input voltage: AC100-240V 50-60HZ, 1.5A(5M), Operating temperature: -20℃-50℃, Current: 0.6A(2M), LED chip: SMD5050, 5M, Output voltage: DC12V, Output wattage: 24W, Luminous flux: 300lumens/m, Waterproof: IP65
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Coupons for SONOFF L1 2m Smart WiFi RGB LED Strip? Nope, there’re no coupons in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSONLED, AFfbG10, BGSONOFFL1, bgnewledstrip, bgsonofflight, bgledstripson, 502C6B, BGBFAFF2019, BGFFDR, BGCITYADS2019, BGAFF10OFF, BGLIGHT2020, BGTT10, bGhOnEy10, BGYEBWCN, BGdragonBoat, BGSS10%SW, BGSONOFF15, BGELIG0920, BgcLuBofErtA10, BGCLUBOFERTA10, BGHU0206, BGCHSTRIP, BG10OFFAFF, BGwhielabel, BG10OFFAFF1
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF L1 5m Smart WiFi RGB LED Strip [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for SONOFF L1 2m Smart WiFi RGB LED Strip.
Price records source(s): Gearbest, 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)).