PORTLAND, Ore. (AP) -- When an Oregon man sold his girlfriend's mattress set for $100 because she's moving in with him, little did he realize her cat was hiding inside. Roy Dufek helped strap the mattress and box spring to the top of the buyer's car. When he went back inside his girlfriend's suburban Portland home, Camo the cat was nowhere to be found. Dufek later learned that Camo liked to hide in a hole in the box spring. The couple have searched the mattress buyer's home and yard, and they've set up an animal trap in the garage where the buyer stored the mattress. They even rented a thermal camera to search the neighborhood. A week later, Camo's still missing. Dufek and his girlfriend are offering a $200 reward to whoever finds him.