have had them a few years in light use.
they still work great we just upgraded to an ip system and don't need these anymore.
they are $100 each
4 Channel PCI DVR Web-Cam Server Card
PI Manufacturing brings to you the latest in digital video recording and video surveillance. This professional grade PCI DVR video capture card is for expanding your existing Linux based system. The PCI video capture card has 4 BNC connections which allows for 4 different video input feeds. This will expand your system by four extra video feeds allowing a wider and more comprehensive surveillance of the area. Your Linux operating system and software that was included in the first installation package is completely compatible with this additional card and will allow up to 3 additional cards with 4 video inputs on each.
4 channel BNC connection PCI video capture card allows 4 simultaneous video input feeds
All video inputs are Color or Black/White camera compatible
Up to 30 frames per second (fps) on each camera for local monitoring
Completely compatible with your existing initial Linux DVR server package
Records, displays and playbacks all simultaneously
Single, quad, or multiplexer display functions make it easy for local monitoring
Expandable for up to 3 additional PCI video capture cards totaling a possible 16 live video feeds