Baseball cards could be priceless to some and worthless to others. Its important to remember that collecting is not about the money. When it comes to money, a baseball card is only worth what someone is willing to pay for it. My personal experience is that when buying baseball cards always look for rookies and popular players these cards normally give your best return on investment. Their are baseball cards that gain value overnight but also loose value at the same speed. When a player enters the Hall Of Fame look for a big increase in that cards value. If the player is involved in some type of controversy expect that players card value to drop substantially.