I'm positive people sell medication be it methadone or other drugs. I also know that these informants are payed to bust people. I had a friend who's whole job was to bust people for money. He had no morals either, He'd turn me in for money If I hadn't gotten away from him. It wouldn't be for selling or giving anything to him. It would be because he was desperate for someone to set up or use to get money from police. I take what the cops say when it comes to informants with a grain of salt.