Off-duty Marion County Sheriff's Detective Thomas Tingue spotted a travel trailer on the road with a "For Sale" sign.
He called the number to ask the price and learned the trailer was stolen.
The seller even described the suspected thief.
Tingue followed the vehicle, approached the driver and called for back-up.
Authorities busted Tommy Behringer.
By the way, Detective Tingue says he's no longer interested in the trailer.