1991 Kellogg's Willie Mays card number 3A 1991 Kellogg's Willie Mays card number 3 has a book value of about $1.00 in Near Mint - Mint condition. Professionally graded cards will sell for more. Condition is important.
Common flaws with Baseball cards include: rounded edges, creases, off centered, and faded color. Any or all flaws will devalue the card significantly.