sell used books

My sweetie and I are looking for ways how to earn more money. We thought of selling stuff that we haven't been using anymore but might be of use to other people. Maybe it's a good idea to sell used books and magazines. I have a ton of the latter. I just don't know how to start. It may be a bit tedious to hold your own garage sale. May be I can set up a set for it but I don't look forward to the hassle of shipping the goods. Oh well. I hope we get to figure out something soon.