Somewhere out there is what the Independent calls a "passionate group of royal cake collectors." And one member of that group shelled out $1,375 this week for a 33-year-old slice of cake served at Charles and Diana's wedding in 1981. "With best wishes from Their Royal Highnesses, the Prince & Princess of Wales," reads the card that accompanies the slice in its original presentation box. The online buyer in the sale by Nate D. Sanders Auctions of Los Angeles wasn't named. The slice is, of course, older than Prince William, and cake from his 2011 wedding is already hitting the auction block, notes Hello!