A German thief steals a car navigation system and auctions it online back to the owner.

The thief is now cooling his heels in jail. Police in Berlin say the 26-year-old owner spotted the device on an Internet in-auction site. He then quickly re-acquired the in-car navigation system that the thief stole from his car some two weeks prior.

After receiving a complaint from the original owner, police went to the thief's house posing as the buyer and arrested the 21-year-old man. The suspect later confessed to the crime.

"I think the thief got a bit of a surprise," a Berlin police spokesman says.