This is the page for your county:
Greene County, Missouri (MO) Scanner Frequencies and Radio Frequency Reference
This is the TRS (Trunking System) that most of your county is on:
Springfield / Greene County Public Safety/Services Trunking System, Springfield, Missouri - Scanner Frequencies
This is the statewide TRS that you SHP is on:
You HAVE to have P25 capability to monitor your area!
The following Pre-Programmed
scanners will work (They are programmed with literally all the RR database, and you can AUTOMATICALLY update them):
GRE PSR-800 (I would recommend this one, as it does some advanced stuff)
Uniden Home-patrol HP-1 or HP-2 (This scanner has a touch screen)
Those scanners allow you to simply enter you ZIP, and it AUTOMATICALLY pulls up the info for your county and allows you to scan.
scanners which will work (these scanners have some Pre-programmed stuff, but there's no way to automatically update it, so it will quickly become obsolete, and they might not have your area):
RadioShack Pro-106 (Handheld)
RadioShack Pro-197 (Desktop)
GRE PSR-500 (Handheld)
GRE PSR-600 (Desktop)
Uniden BCD396XT (Handheld)
Uniden BCD996XT (Desktop)
Hope this helps you!