Please explain your feature request to the best of your abilities:

I currently own this plot, and I put it up for sale "accidently"

How would a player know they own it and put it up for sale accidently.

Is it possible to make it it say "For sale $$$$ By Playername"

Additionally if a player tries to buy their own plot, it gives them an error message not further explaining what they did wrong.

Maybe it could say "you cannot buy your own plot, you already own this" etc

currently it says "selected area contains no valid plots"