Mining the county assessor's site for data

[Vic Waln]

I hope this is where the techies hang out...
I have a list of expired listings from an agent friend of ours.
I am writing a bash ( Bourne Again SHell ) script to extract information.
I want to access the Adams County ( Colorado ) assessor's site from the command line, through a bash script.
I have completed the Jefferson County ( Colorado ) part of my script, as I can get where I need to go through URLs.
The Adams County site is ASP.NET. I have never done this sort of mining. I hope maybe someone has a pointer or two for me. I am going to need to GET and POST and use variables about which I am not familiar.
I wish to complete a bash script which I can run from a linux command line. I am using cURL in other scripts to get data and hope to keep using it, though maybe it is not capable....

I endeavored to include as much information as I could. Please ask me anything that you need to know. I thank you all for your time and attention.