You can check the database here on radio reference to see if there’s any agencies in your area that are using those formats that you would like to monitor.
As far as the cost, you can purchase and install the upgrades yourself direct from Uniden for less money than the dealers charge. It’s a very simple process, and only takes a few minutes. Upgrade at this link:
In addition to the upgrades, you may need new programming software. Freescan doesn't support these modes. I'd personally recommend ProScan. The software works well, is comprehensive in its abilities, fairly easy to learn, and has excellent, USA, support.