I use a Dymo LabelWriter 450 Turbo with Dymo Address Labels. Now depending on your preferences such as placement of label, information contained on label, etc., you can use the larger shipping label with this printer. If you are going to include the cover picture on your identification labels, keep in mind most label printers are thermal and therefore print in black & white. If you want the miniature cover on your label to be in color, then you will need to use Avery or Avery compatible labels with your computers color printer. They do make color label printers but, they are expensive.
Pete had shared a great resource and a great tip on the live stream. He shared label city as a great place to get labels because they are always running promotions and rebates where if you buy a large enough order of labels they will provide you a printer for free via rebate. A tip Pete shared was he found when you have thousands of books and you need to find an issue quickly, placing the label at the top center of the comic book bag really speeds up the process as you are flipping through.