One free website for determining the value of baseball cards is SportsCardDatabase.com. Partial information only is provided at first, but more complete information about card values can be accessed by completing a free registration.
SportsCardDatabase.com is searched by keywords and searches return a list of all relevant baseball cards. Many of the listings also have images of the card on file. Once the desired card is located, the website displays the current market value of the card as well as a chart of its value over time. Links to current eBay auctions for that specific card, if applicable, are also displayed, which provide the user with a real-time idea of the card's value. Registered users can also create databases of their personal collections that provide estimates of their total value.
The value of a baseball card depends on both the card and its condition, so many of the traditional printed guides provide a range of values from low to high. SportsCardDatabase.com provides only one value. However, this value is generated by factoring in and normalizing pricing indicators such as demand, availability, condition, and both recent and historic activity. This service is provided for hockey, football, and basketball cards in addition to baseball cards.