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.
A few reputable news sources listed Cyber-Stein and Crush Card Virus as the two most valuable cards as of today. So I highly doubt that these cards are worth as much as some of the lists say they are. The list I found them on is also clearly outdated because it listed Cyber-Stein at $4,000, Gold Sarcophagus at $2,200, Des Volstgalph at $1,900 and Shrink at $1,600.