Greenway Boulevard in Middleton, Greenway Trail in Madison, Greenway in Janesville, York, Pleasant Prairie. You are in Monona: Greenway Rd in Monona...looks like vacant lots, 3 of them, listed for $89K each, assessed at $50,600.
What makes you think "Assessed Value" has anything to do with "Market Value"?
Maybe it is the uninformed seller...the Invisible Hand will eventually smack down one of these wrong opinions. I think someone will build a house on each of these lots and they will pay more than the assessed values when they buy. My not-so-humble opinion.