IdahoScrapper 
Hard drive board is a different grade....It has its own grade, they are commonly known as logic boards....Most floppy drives do not have great boards in them and they are usually small. As Mech said it is usually better to sell them whole because they are a major pain to tear apart without a lot of time spent.
The main board or motherboard is actually grouped in with server boards since it came from a laptop and not a desktop computer. Nice job on the tear down.
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