Most of these things have very little value, so I donate or recycle them. But a few seem valuable enough that I ought to sell them. I don't have a lot of time or energy for this, so I try to sell this stuff in ways that are fast and painless, even if I don't maximize the proceeds. I've been happy selling books through Amazon's used book marketplace and shipping them with USPS flat rate envelopes.
My process works like this:
- Find the book's page on Amazon, enter the book's condition (e.g. "Used - Good"), and a brief description (e.g. "Crease on cover"), and my price. I usually set my price so my book is one of the cheapest available.
- Wait for an email from Amazon saying that a book sold.
- Go to Amazon's page and print an invoice for the book.
- Put the book and invoice in a Flat Rate Envelope.
- Go to the USPS web page and use their "Click'n'Ship" facility to buy flat rate postage and print a shipping label.
- Tape the label to the envelope and drop it in a mailbox.
- Go back to Amazon's page and send the buyer a message with the tracking number.
The beauty of this system is that once it's set up, I can sell books without interacting with customers or leaving the house!