You'll definitely need a printer, scale, and a stockpile of appropriate sized boxes, packing tape, bubblewrap, labels, etc. Do your research and you should be able to order online for best prices. Also you can order some supplies directly from USPS.com (like priority mail boxes) and they will ship to your home.
The size/weight of your items will really determine the best shipping method (first class mail, priority mail, UPS, Fedex) etc. UPS will pick up shipments at your home/business. When you sign up for a business account pick ups are free for the first year. You can also order some free labels and supplies (they do limit the quantity of those you can order at one time).
