much like a social security number an employer identification number ein is a federal nine digit number that identifies a business entity the internal revenue service irs issues eins and requires their use on all tax filings during the entire life of a business
Game used items such as the ball in which Mark McGwire hit his 70th home run of the 1998 season sold for $3 million. The most expensive piece of sports memorabilia ever sold at auction was a New York Yankees baseball jersey that was worn by Babe Ruth during the 1920 season.
When the NBA, MLB, NHL and NFL began selling their jerseys in stores during the 1980s, game used jerseys also became a hot item among sports memorabilia collectors. Former NBA player Dennis Rodman was famous for taking off his jerseys and throwing them to the stands after his games were over.