Black Market Gas at $20 a Gallion After Sandy

Gas cans, also in short supply, going much higher

Opportunists looking to profit off superstorm Sandy are advertising gasoline for as high as $20 a gallon on the black market after the storm crippled the ability for some tankers to pump gasoline and deliver it to stations in the Northeast, some of which are still powerless.

A former insurance adjuster who now works as a contractor in Brooklyn told ABCNews.com he stocked up on 500 gallons of gas before Sandy hit. He has since sold his entire inventory.

"I was able to sell everything for $11 a gallon. I probably could have gouged people for twenty bucks and they would have paid it," he said.