If you believe they work you can record each one and make a good profit. There are companies that will buy them as is and test and record themselves.
You spend $5-10 bucks on the cord and sell them for $40-60 each you can make good cash
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If you believe they work you can record each one and make a good profit. There are companies that will buy them as is and test and record themselves.
You spend $5-10 bucks on the cord and sell them for $40-60 each you can make good cash
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