LOS ANGELES (CBSLA.com)  —  Rare sports memorabilia is being auctioned for a good cause.

The items are being auctioned the by the Helms Athletic Foundation and many date back as far as the 1927 World Series.

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Organizers of the auction say there are about 300 items up for bid, including signed baseball gloves, a vintage Heisman Trophy, World Series programs, Jack Dempsey boxing gloves, a Bo Jackson signed jersey, a signed basketball from Sparks star Lisa Leslie and a tennis dress once owned by Billie Jean King, to name a few.

And when you find out how much the complete set of 1952 Topps baseball cards are worth, you will likely scream obscenities at your mother for throwing out yours.

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The rare items are considered major scores by sports enthusiasts.

Proceeds from the auction will benefit the LA84 Foundation, a nonprofit organization that provides grants and scholarships to young people and sports programs in eight Southern California counties.

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The auction runs through Aug. 23. For more information about the auction, click here.