Then calculate individual totals at the end of the sale. If your sale is inside your home, place a table for sales collection by the door. This should prevent items from leaving without being purchased. Keep a sharp eye on items displayed in the yard. Keep plenty of change, and decide if you will accept checks.
Cash is always good.
Part of the fun in garage sales is in the bargaining on prices. Before your sale, it's a good idea to go to a few others to see how items are priced. You won't get the original value out of your items. You can, however, get a lot of things out of your house and get some reimbursement for them. Some items, such as used clothing, are hard to sell.