A rating on OfferUp is the average number of gold stars someone has been rated. The number next to the stars shows how many people have rated them.
For example, Torrey has been rated by 20 people, with an average of 5 stars.
After someone buys or sells something, the app asks them to rate the other person. Each person can choose to give up to 5 stars, and can choose to include other review notes. People can only give whole numbers of stars. If you see a half star in someone’s rating, that’s from averaging multiple different ratings.
When someone has more than one sale with the same person, that person can rate them for each sale. The number following the stars will only increase by one, and will be counted at the first time that the person rates them. The number of stars for each item will be averaged with all other stars earned.
At this time, there's no way to see which people gave which ratings or reviews.