Back in 2007, a family in New York bought a small, white ceramic bowl at a garage sale for $3. (Names and hometown has not been revealed.)

They proceeded to display it on their mantel for five years. Then one day, decided they were curious to see if it was worth anything, so they brought it to get appraised.

Wise move!

Turns out the bowl was from the Song Dynasty, which ruled China from 960 to 1279. That makes the bowl about 1,000 years old. On top of that, there is only one other bowl like it in existence, and it's been in a museum for the past 60 years.

Experts estimated it was worth between $200,000 to $300,000. They were wrong. The bowl sold at a Sotheby's Auction on Tuesday for $2.15 million! An art dealer named Giuseppe Eskenazi bought it.

How's that for 'return on investment'?!