Could be for sale by owner.
Their house is not for sale. They are just trying to make a point about a neighbor who appears to be an idiot. I, too, have one one of those. He doesn’t have barking dogs but he has not trimmed a tree or bush in his front or back yard or mowed the back yard in eight years. He is an HB-1 from Russia and his wife has an HB-1 from China. Have to admire their guts for putting the sign up. Freedom of speech is alive and well in Texas!!!!!!