Just put in 3rd Q See System I bought thru Costco online. Still playing with Options and upgrades. 2 systems were 16 Channel and came with 8 cameras, and one was a 16 channel that came with 16 Cameras.
So far have bought 4 Sound capable cameras, which allowed me to have more for the systems that came with 8, (replaced 2 on the 16 camera system.) Have installed 1 extra hard drive (Each come with one 500GB and an extra one is a plug and play insalation, and installed one DVD burner which is also plug and play. Otherwise you can back up or copy to a flash drive. The initial Hard drive seems to hold about 2 weeks with 9 cameras running. I wanted longer storage. I will install extra hard drives and DVD burners in all.
Units are internet ready. Only one of my places has internet and I still need to figure this out. all cameras can be set for motion record only and each motion registers an "Event" which can be searched. The systems say they can be accessed by cell phones, but this must be part of the internet function as well.
In a few locations lighting is an issue where the camera is inside and are and looking toward the outside where it may be sunny, the picture is dark.
System with 8 Cameras and DVR (No DVD burner - about $40.00 or second hard drive - about $80.00) was $799.00. Cameras have 60 ft cables . Extensions / longer cables are available. I think I bought all extra cameras - with sound, and cables thru Amazon. Bought a 19" LCD at costco for $199 for 2 systems. Bought a 22" monitor with speakers for less and then realized it was like a computer needing powered speakers. So jbought computer powered spealers for $19.00 from Best Buy and needed an adapter fitting from Radio Shack. But the larger monitor is nice if you have 9-16 camers showing at once.
So total cost for 16 camera system with 2 sound cameras, second hard drive, DVD burner , and 22" Monitor extra cables and speakers was under $2000.00 plus our own labor for install.