User research. Hence, good Netiquette to research buyers or sellers. So, don’t do business blindly.
User Research Netiquette Auctions
If a user has a lot of good feedback you can expect a smooth transaction. If there is negative feedback, you be the judge.
Good feedback usually leads to a smooth transaction. It means people felt good enough about their transaction to leave feedback. There are usually a lot of smooth transactions for sellers with a small amount of good feedback. Many users do not leave positive feedback when a seller deserves it.
Bad feedback should taken seriously. Many people cannot afford to be swindled. The time it takes to get a refund may cost more then the the item is worth.
Research the buyer or seller because it can help avoid problems.