First pic is a motor, my yard allows me to leave them in.
Yes magnets are worth money check ebay.
3rd pic yes those will go for $2 per pound
It's copper just different colors.
Pic 5. Not all of it is alum. check it with a magnet. The patters go for more than alum if sold on ebay.
pic 6 will be clean alum
Stuck = steel non stick = stainless or alum. You can tell with a scratch test or by weight.
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