This from Reuters news:
"London's most expensive sandwich, nick-named 'The MacDonald Sandwich', is seen at Selfridges in London April 10, 2006. The sandwich, which is on sale for 85 pounds ($148 dollars), contains ingredients of Wagyu beef, fresh lobe foie gras, black truffle mayonnaise, brie de meaux, rocket, red pepper and mustard confit and English plum tomatoes." REUTERS/Paul Hackett
I could buy about ten days' worth of groceries for that price.