We are never going to sell your info to anyone - not your name, address, phone number, email, or even how much you ordered. We won't give it away, either. We hate it when people do that to us.
We will use the contact info you leave to reach you to give you updates about your order, or (very rarely) send you a newsletter if you click that you want them, and that's it. These emails will come from the person handling the item, so they may come from email@example.com or firstname.lastname@example.org or some other address, but they will never come from an automated mailer.
We may sometimes make infographics about items to post on G+. They'll never mention you specifically, unless you want to comment and claim it for yourself in the post. Our posts are public, so please do make sure you're protecting your own privacy.