If you determine a card is worth selling, you may want to consider having it professionally authenticated and graded.The most popular third-party grading service is PSA (Professional Sports Authenticator) and there are other well-known services such as BGS (Beckett Grading Services) and SCG (Sports Card Guarantee).Having a card graded mainly serves to gauge its condition on a 1-10 scale, with 10 being the best. These flaws are less impactful on value and are usually only factored in when having the card professionally graded. Then there are minor imperfections, such as centering and chipping, that are a result of how well the card was printed. This kind of damage can severely lower the value of a card. There are obvious flaws such as scratches, bends, and tears, usually caused by playing with the cards or not storing them properly. Any card you think may have value should be stored in a protective sleeve and kept out of direct sunlight to preserve its condition.Ī perfect mint or near-mint condition card will usually sell for full price, while any flaws will cause it to lose value. Once you’ve figured out which cards in your collection are rare enough to consider selling, the next step is to assess their condition.