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.
Once owned by Wayne Gretzky, the highest graded example has traded hands numerous times and currently tops out just shy of three million dollars. The T206 Honus Wagner has been the world's most valuable baseball card for several decades and may hold the title as most expensive baseball card for years to come.