Just check coupons out (with price alert and history). Do you want to know what the best price is?
4x 3000TVL Waterproof IR-cut Bullet Security Camera, 4x 60ft Video Power Cable for Security Camera, Package Contents: 1x 8CH DVR, 1x CD Software, 1x Power Supply for Cameras (EU Plug), 1x Power Supply for DVR (EU Plug), 1x English User Manual, 1x Power Splitter Cable for Camera, 1x USB Mouse for DVR
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Here is price history (for all/most countries) for Stalwall KA1008 8CH 1080P AHD DVR 4x Camera KIT.
Price records source(s): Gearbest
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)).