Smuggling Venezuelan Gas.

Globalpost.com

Venezuela has perhaps the world's cheapest gas which it subsidizes with $8 billion a year.

"A gallon of 95-octane gas sells for 18 cents per gallon, while 91-octane costs just 12 cents per gallon. In contrast, in Colombia, where the price is set by the free market and which has less oil, gasoline sells for around $4.15 per gallon."