Neighbor rushes to sell after property line survey

DEAR BARRY: A recent property line survey revealed that my neighbors are encroaching onto my yard. Their garage is built on the property line, and their fence and walkways are three feet onto my side of the line. We wrote a letter asking that they do something about this.

A few days later, we found the surveyor’s stake pulled out and hidden in the bushes. Now the neighbors have listed their home for sale and have not responded to our letter. What can we do? –Susan