There are different variations of errors on Baseball cards. Some more desirable than others. Errors such as mistakes made on information on the card will only be worth more money if the mistake was corrected, and the card that was printed in the fewest quantity would be worth the most. Not necessary the card with the error.
Other errors are made during the printing process. "Flopped" negative image, Wrong back, Blank back, printed half off center, or combined with another player to name a few examples. Barry Bonds cards with errors such as Blank Backs (or front) sell for about $5.-$15. depending on the original value of the card, as a Barry Bonds Rookie card blank back will have a higher value.
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You would need a website to list the values of all Barry Bonds baseball cards so I will leave you with a list of all his rookie cards. There are 16 different variations of Bonds rookie cards. The value listed represents an un-graded card in mint condition, but expect its true selling value to be slightly under the listed price. 1986 Topps Traded $40
1986 Topps Traded Tiffany (rare) $700
1986 Donruss "The Rookies" $40
1986 Fleer Update $50
1986 Sportflics Rookies $20
1987 Topps $12
1987 Topps Tiffany (rare) $60
1987 Topps Glossy $15
1987 Donruss $15
1987 Donruss Leaf variation $15
1987 Classic Yellow $20
1987 Classic Yellow (green back) $25
1987 Fleer Hottest Stars $50
1987 Fleer $60
1987 Fleer Glossy $80
1987 Toys R' Us Rookies $25