I agree! that is harrassment and you cannot be expected to open the door at all hours. Tell the agents that you will allow them with 24 hour notice, and will be happy to be accomodating, but they simply cant show up and knock on the door. I understand the current owner wants to sell his place, but maybe explaining to him with some warning, you can have the place cleaner, and animals under control instead of having to shove things into corners and be freaking out.

Jack the cat is now inside the bag that the big paper towels came in. Some how he thinks those things are magic. IM just happy he is happy.