You can find a courier that you feel has good service and is as close to you as possible. Go to the store and talk to the boss or the person in charge. First, you need to determine how many pieces you sell per month. Then you can discuss whether the courier will pick up the items at your door or you can deliver them yourself. Also, whether the courier fee should be paid weekly or monthly. These are equivalent to a verbal agreement. After all, it is a small business, so don't be too serious about this!