Yes or No, and Explain, Please.

[Zorlinta]

I suspect just about everyone involved knows exactly what is meant by 'Selling a plot/house'

You are totally wrong, here on this forums some few time ago was posted couple of cases where people was asking help from GM's because that statement was not clear, as those players just looking the selling advertisement on party finder and didnt had much background information about it. So in the end they ended paying for plot being free and then being unable to buy the plot.
Though of course was some of their fault the lacking of information, still the Selling plot advertisement falls under a false advertisement case.