A Mickey Mantle signature model bat that might be the first one he used in Major League Baseball is going up for auction, with an expected selling price of about $200,000. The minimum bid for the bat in next month’s online sale by SCP Auctions Inc. is $30,000. Several of Mantle’s items will be auctioned, almost 20 years after the Hall-of-Fame New York Yankee died at age 63 in August 1995.