I have a Chipper Jones national mvp league award card in good condition

Please check out the following sites:

Baseball Card Value Price Guide | Selling Baseball Cards

CollectSports - Baseball Card Price Guide, Sports Cards, Auctions, Collectibles, Trading Cards, Football Cards, Basketball Cards, Hockey Cards

Beckett Media LP - The #1 Authority on Collectibles

Also, if you go to a bookstore, you will probably find books concerning the pricing of baseball cards.