Estate Sale Costs

50% is on the high end. You can find companies that would go down to as low as 30-35% of the gross, depending on your location, but they are normally smaller auction houses. Don’t be afraid to negotiate after they see the stuff you’re listing. The larger reach the house has, the higher percentage they’ll charge. It’s a trade off, you might get too dollar at a larger house if it’s very nice stuff that is currently in demand because of their larger client lists and better advertising. I suggest you look at the kinds of auctions the houses you’re looking at have held in the past. Pick one that has similar items.

Will you post the listing so we can all come?

Be careful. These are not the most scrupulous people.

I don't know the average costs BUT make sure they properly list/promote/and work the sale.

My neighbor had to do one for their dead relative and it ended up the Estate Sale "company" really just wanted to trick them into donating the left over stuff to some "church" - so they didn't promote or work the sale very effectively.