It's never a clean process and usually not worth it, especially if the seller wants any sort of compensation for the bookings.But since it's not legal it doesn't really matter, just say no thanks!

What was your clean up cost? 

He obviously hadn't cleaned in all those years.

Standard repairs and clean up.

Depending on where your sewer runs you may be able to dig along side of slab and just have a clean out installed, but it can be quite costly.

Of course once you add the cleaning fee, it becomes pretty unattractive.How many days are we talking about in a year? 

You want to work with a buyer that is as clean as possible and can close without any problems.

Scrape, clean, & THEN paint

Without specifically asking the PM what the fees are for I can see that perhaps that amount is set aside at the beginning to be used for something like cleaning the carpets.

Clean out pipe broke off and was laying in the yard for i don't know how long.