First time tearing apart electronics-need some adivice..Tons of pictures!

If you see any gold showing (pins or fingers) Then your looking at usually hi grade. The first pic looks like a brass phone connector. Cat 5 looks almost the same but has more lil pins than a phone line/cord and is gold. You kept the least valuable thing in the keyboard, hang onto the plastic film, when you get a couple of pounds then you can ebay them or maybe sell on one of the gold forums. If all the sorting and deciding is giving you a headache you might try just selling the electronic stuff to a ewaste scrapper.
Example of a mid grade;

Example of a low grade;

Example of a motherboard;

Example of cord ends;