Last Day To Bid In Auctions Sale Auctions is proud to announce it has one of the landmark pieces in Major League Baseball history in its Sports & Americana Auction No. 5 with the inclusion of Mark McGwire’s 500th home run baseball, fully certified by PSA/DNA. Bidding is in its last day ending today, Aug. 12.  For more information on this item and other pieces of memorabilia in the current auction, visit, or call 888-463-3063.