Ewaste questions

I know scrap yards are all a little different but I was curious what general categories the following types of ewaste fall under.

Hard drive cases that have been stripped all the way down and have no stickers / etc. Do these fall under dirty aluminum? They have anodizing but other than that nothing is left on them.

Hard drive motors and read/write arms.

Computer cases stripped all the way down to metal and plastic.



And finally what do most yards say copper heat sinks are? Do they need to be cleaned of thermal paste?

Thanks,

Rob

Here in LV clean HDD cases are taken as cast aluminum at most yards. HDD motors go as regular motors and no one local that I know of has a special price or category for the clean arms, just aluminum. Stripped towers consisting of both iron and plastic will go as tin/shred/light iron.