Justin Glow of Gadling wrote an article about 13 heists from around the world, for example:
Not everyone steals famous paintings, cash, or microchips. In fact, some people go to great lengths to get their hands on some very unsavory -- yet quite expensive -- items. In November of 2005, a farmer at Smithburg, Maryland's Stonewood Acres had ventured to Pennsylvania to visit relatives. When he returned to the farm, he noticed a 70-pound tank filled with $75,000 worth of bull semen had been opened up, with sixty-five "straws" containing the sperm of nearly 50 bulls missing. "Frozen bull semen is big business because it saves on the transportation cost of putting a bull and a cow into the same pen to breed," explains the Washington Post. "Frozen semen can also last for many years, outliving the bull who produced it." Moo?
Link - Thanks Justin!