What are the Ratios of CU/AL in AC/Condenser Coils?

I'm curious if anybody here has the recovery percentage in the clean coils (the ones that have the C-shaped cu cut off and the steel removed (see image below))?
I was given several window units but without receipt I can only sell them as shred.
Once I get a good scale I'll do the numbers and post.
Curious if it's worth the effort to liberate the cu from inside.
Also, any methods to liberate the cu?