re: If you inherited 20% of a piece of land, and you want to sell.. but....

Listen to this guy. All coowners may force a sale of coowned property. The court prefers to partition the property in king; however, if the property does not allow a division of similarly valued portions - like a portion borders a road, etc - the court will divide the property by licitation.

There's the rule for the bar exam. Lol.

Now, go hire an attorney.