Land value on public record vs. asking price

[Kaitlyn Pratt]

I'm looking at buying land in Colorado Springs, I looked at a property listed at $125,000 and then I took a look at it on the county public records parcel map and it was listed with a market value of $30,000, and another property listed at $230,000 or so on Zillow, but again the market value on public record was listed at $60,000. Is this common, if so I'm curious why. And am i likely to have much luck if I offer something closer to the public record assessment market price? Thanks.