Currently radio shack has scanners in the $79 range on closeout.

Bear in mind that these are Analog systems, and they only offer minimal "Trunk Tracking" and no digital capabilities at all.

Check www.radioreference.com for information about the systems used in your area. If you are on a "Conventional" system or even a "Trunked" system, these "Trunk Trackers" from Radioshack will do fine. If you're on a system such as a "Motorola Astro" you will be out of luck, as the cheapest digital scanners made are $500 or so.