M&Ms are one of the more value-driven chocolates out there, especially if you break down their price per piece and compare it to the price per piece (discounting size) of other chocolates. This is why it is so surprising to hear that the mot expensive M&M ever sold went for $1,500. The candy in question was a single brown M&M and, although the color is retired from the candy's "regular" package (it can still be ordered online if you really love brown), that is not the reason it was so valuable to some collectors. It was valuable because it was part of a space flight. This particular piece of chocolate was on board the June 21, 2004 flight of Paul Allen's SpaceShipOne, the first privately funded spaceflight, and "space collectors" will buy just about anything that has left Earth's atmosphere. Getting "flown" can turn a $3 toothbrush into a $23,000 toothbrush, which is exactly how much one buyer paid for "a flown toothbrush that astronaut Buzz Aldrin used during the Apollo 11 mission."
Assuming that a regular bag of M&Ms cost $.99, you could have 1,515 bags for the price paid for just that one little candy.