Plenty of stats. Some here on Trulia. You can also check out AOL real estate has some good stats, per Town as well.
Domania is pretty good too. All free.
Hope that is helpful. If you know what a neighbor or somebody on your street recently sold for, and it helps your case, that would be beneficial to include as well.
Let me know if you need any further help. Good luck with the abatement!
Ken L.... more