Getting a pager to scan on two frequencies?

I am new to everything here and would like to get a pager for Monroe County Michigan. They are set at the frequency 159.0900 I believe. I would like to get a Minitor IV or newer for under $200. I would also like to scan the Lucas County Life Squad channel. Monroe's channels I believe are lower but I think Lucas County runs on the 800. What should I be looking at? How much am I looking at? I would like a charger, batteries, a case, and the pager can be used or refurbished as long as it works and looks nice. Is it possible to set it so that when any life squad goes out it pages me? I am not sure if it has to be one tone activates the page per frequency or how it works.