First, the most important thing is geographical location, and the choice of location is particularly important. If you put this machine in a remote place with little traffic, you won't make money no matter how complete your goods are and how cheap your prices are. Suppose you put it in a lot with a very large passenger flow and a very good geographical location, you will definitely earn more than a remote place.
Second, whether the goods placed on the vending machine are relatively complete and whether they are what the general public needs. Suppose you put an unusual fresh thing on the vending machine, which is not suitable, then consumers may buy it for the first time out of novelty, but the chances of repeated purchases will be relatively small; If the vending machine is full of things people need, such as sausages, bread, mineral water, drinks and some very practical things, the purchase rate will be higher.
Third, the price factor, which is actually the competitiveness of vending machines. If you price the same thing higher, there will definitely be fewer buyers, because 60% to 70% of office workers also care about the price. If your price is standard or a little cheaper, you can lose it. Personally, I think it can be small profits but quick turnover. Because consumers have a psychology of taking advantage, they all hope that what they buy is economical.
Fourth, the quality of goods, this is actually the most important. Because some consumers will look at the production date and shelf life when buying food or used things, don't buy things that are about to expire at a low price, which will make consumers very disgusted and not do much good to your reputation. You can make money by choosing some newly produced things and ensuring the quality of the goods.