May 22nd, 2010, Guy named Laszlo Hanyecz paid to Bitcointalkforums user 10000 BTC for two Papa Jon`s pizza.
At that time bitcoin mining was also possible with a single laptop.
Today this 10 000 Bitcoins have a value of 9,9 million dollars.
Bytheway this Guy mined more bitcoins and sold them when their price was 1 $ each for 4000$ , what to say:).
With that money he bought a new computer.
img source:http://www.989wolf.com/new-pizza-box/