One point is the items should be shipped back BEFORE you refund the money.
Then if they are damaged in return shipping the (former) buyer is on the hook. for insurance and claims.
Since you can be trusted to send stuff after getting value, the refund should be in the same manner. He sends back the amps, you then refund.
Then if they are damaged in return shipping the (former) buyer is on the hook. for insurance and claims.
Since you can be trusted to send stuff after getting value, the refund should be in the same manner. He sends back the amps, you then refund.

