A consumer’s guide to the best and worst of sports media and merchandise. Ground rules: If it can be read, played, heard, observed, worn, viewed, dialed or downloaded, it’s in play here.

What: Worthguide.com

Worthguide.com provides pricing information on thousands of items traded in online auctions, among them sports memorabilia and baseball cards. This is a great site to visit if you’re wondering how much those old cards in the attic are worth. Or to find out which rookie cards you should purchase. Simply type in the address and click on sports memorabilia. You’ll find volume and sales numbers for all the hottest cards.

Besides the obvious--such as Ken Griffey Jr., Mark McGwire and Sammy Sosa cards--you’ll find that Montreal’s Vladimir Guerrero is close to breaking into the top 10 of the hottest selling cards. And that St. Louis rookie Rick Ankiel is already in the top 20.

After tracking closed on-line auctions each day, Worthguide.com translates the information into easy-to-read charts and graphs. Here’s a look at the top 10 baseball cards traded through on-line auctions for the first quarter of this year:

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Card Year Price 1. Roberto Clemente Topps 3-D PSA 10 1968 $39,999 2. Babe Ruth Goudey No. 181 PSA 8 1933 $30,000 3. Ted Williams Topps No. 250 PSA 9 1954 $26,210 4. Hank Aaron Topps PSA 9 1954 $25,369 5. Mickey Mantle Topps SGC 88 1952 $22,100 6. Roberto Clemente Topps 3-D PSA 9 1968 $22,000 7. Mickey Mantle Bowman Color PSA 9 1953 $17,000 8. Joe Jackson National Game PSA 10 1913 $15,651 9. Joe Jackson Cracker Jack 1914 $15,151 10. Ty Cobb T206 Bat on shoulder PSA 8 1909-11 $14,900

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Here are the top five selling baseball cards among active players:

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Player Volume Sales 1. Ken Griffey Jr. 17,760 $991,365 2. Mark McGwire 19,914 $716,773 3. Sammy Sosa 11,863 $401,071 4. Derek Jeter 10,284 $326,806 5. Alex Rodriguez 5,748 $300,542

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