JFK's birthday cake for sale

Call J. Peterman! This unappetizing piece of cake is up for auction right now with a current bid of $2,500. Why? It's from JFK's 45th birthday party in 1962, the one where Marilyn Monroe seductively sang "Happy Birthday, Mr. President." From Collectors Weekly:
 Articles Wp-Content Uploads 2010 11 Jfkcake2The piece of cake up for auction is actually a sugar-frosted decoration on cardboard–it was spirited away from the ceremony by a police officer who was part of the event’s security staff. Along with a program from the event, the piece is expected to bring between $5,000 and $10,000.
"Let Them Eat JFK’s Birthday Cake"