How can I find out the similar property sold price in year 2001 and 2003

[yqyq]

just got my property assessment which is way too high than the real value based on June 2001 and 2003.
I plan to go reconsideration and need the similar property sold price in those years. How can I find out these?
Any experience on this?

Thanks a lot for your help and time!

 

[oread]

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