How to grade motherboards according to boardsort.com

This video defines the 9 grades of scrap motherboards purchased at boardsort.com.
The 9 grades are:
LAPTOP MOTHERBOARD
LARGE SOCKET MOTHERBOARD
SMALL SOCKET P4 GREEN MOTHERBOARD
GREEN METAL SOCKET MOTHERBOARD
SMALL PLASTIC OR METAL SOCKET COLORED MOTHERBOARD
SMALL PLASTIC SOCKET AMD MOTHERBOARD
INTEGRATED MOTHERBOARD
LARGE SOCKET SERVERBOARD
SMALL OR METAL SOCKET SERVERBOARD