I have been searching for some time for an inexpensive IPCAM NVR that actually works...
I thought I might mention that I found one of the NVR that actually works well. I picked up the DVR for $105 shipped and picked up a 4TB WD Purple drive for it. So far so good. I know it is a China made unit, but it works extremely well with my IPCAM Vivotek ONVIF cameras. It records my 1MP & 2MP cameras at 15 FPS and can record up to 1 month of data on 9 cameras.
Not sure if it is ok to list links to other sights that have items for sale, but I will entertain any PM with more info if there is any interest.