SmrtAss wrote:
My mother used to do them when she was an antiques dealer. Hint, the person who runs the estate sale should not get first dibs on the best stuff.

Maybe google for estate liquidators.

My aunt used an agency for her estate sale. They "lost" valuable items before the sale, and also earmarked things for their purchase before the rest of the world saw them.
If you do it, someone has to monitor the situation, especially any valuable items.

Good luck with it!