The biggest thing is that I trust SDB. I email them. They give me a price and send me an insured FedEx mailing label. I take pictures of the box, etc. I print the label out and drive to FedEx. SDB sends by ACH the agreed upon amount usually within a week. If there is a problem (like one time I didn't properly count the coins i was returning) they called me and we worked it out. I have also been to their location in Michigan---awesome place. Totally secure.
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