My buyer usually has a good price for ACR ends. We cut them with a sawzall (demolition blades work great) just inside the metal strip (only if it isn't aluminum). My buyer usually pays between .50 and .70 for the entire end, Iron included. Since the majority of weight on an average cutoff is iron it's usually cost efficient to sell them as such instead of trying to get the loops out for copper price.
Certain large ACRs with a higher cutoff copper percentage would of course be an exception. It also depends on your buyers ACR cutoff price, assuming they even have one. Happy hunting!
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