I get the impression that..
If theres gold on the board & lotsa small chips, pref with the window, its 'High grade'.
If theres lotsa chips & some have windows (see thru hole in the chips top) & most can be pulled out, its 'med grade'.
If theres full size resisters, not many chips, none with windows & the boards brown & old, ITS 'Low grade' & unless you have ~ like 100Kgs of it or more, its worthless.
The stuff in the pics? I cut the wires & Ali heatsinks & big transistors off & dump the rest.
We don't have
escrap buyers here & I don't get much of it anyway, I save anything with gold on it for the day when I will get in & recover it.
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