As of August 2014, Beckett, Tuffstuff, Portasite and freebaseballcardspriceguide feature guides to aid collectors who are buying, selling and trading their baseball cards. The online guides contain the current market values for thousands of cards, both old and new, from various manufacturers, including Donruss, Fleer, Topps and Upper Deck.
Widely considered the most reputable site by sports trading card enthusiasts, Beckett specializes in valuing cards dating back to 1967. Beckett also features a separate guide for professionally-graded cards. However, subscribers must pay a fee to view this online guide.
Tuff Stuff's expert price guide includes baseball cards from 1935 to present day and also lists the value of select autographs and memorabilia. The site provides collectors with the hobby's latest news, displays information on events and offers tips to collectors.
Freebaseballcardspriceguide.com uses the average price of millions of transactions from a variety of sources to give collectors the most accurate current buying values. The guide is constantly updated with any shifts in the market.
The Portasite guide is unique in that it only lists values for cards issued through 1981, electing to focus on vintage cards before the industry began producing them in massive numbers. This free site also includes a guide to help collectors determine the condition grade of their cards.