The heat sinks with the copper/alum you need to separate for the best money. I just took a load in from computers and tv boards.
I had some classified as old sheet alum. for .55lb
some were alum. MCL (?)which paid .62lb
and the rest were Ext. at .70lb.
I didn't have any cop/alum mix in mine, if they have the copper bottom I think you can shear the fins off in a vise. Then the sinks with copper slugs put it in a vise and right along the slug drive a flat blade screwdriver in and pry the slug out.
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