Lost pet?

We lost our dog once and I'm convinced it was kidnapped. We put up an hundred dollar reward and the dog finders called within 2 hours. They said they really liked our dog and wanted $200. We should have called the police but was afraid we wouldn't get Charmaine back so agreed. When the guys showed up with the dog, (we met them in a parking lot), we said we only had $150 and please give us the dog. We got her back for the $150, but it was a learning experience.