Just Value vs Market value

[Clara Derry]

Hey squad. I am fresh to real estate investing and am learning more about determining reasonable offer prices and market value.  I thought that searching the just values for properties would help with market value since it says "just (market) value." Well, when looking up the just values from 2020, I am noticing large discrepancies from the list price (ex- list 195k, just value 95k).  Could someone offer insight/direct me to resources that could help me understand this discrepancy?