None of that stuff is low grade.
Don't cut fingers off ram
The other finger boards will probably be priced on sort if you sell them to a buyer, or bid on ebay. They will be a mid grade probably a little below mother boards
Laptop boards are usually higher than mother board.
Sell Hard drive boards whole, the should be over $10 lb, connectors sell for well below that
There is a buyer that pays $4 lb for floppy drive connectors, but you have to read to find him, or maybe he will message you. There is a lot of info on this site, we will help, but you have to read soem old posts too. Thats how i learned