Is it an Estate Auction or an Estate sale? I’m not a vendor but a patron of both. An estate sale is just like a garage sale, people in and out all day BUT if it’s a really prestigious sale, people will line up at 5-6 am and you may have some good breakfast/coffee sales. An auction is all day long and again coffee breakfast sales for those to come do preview. The auction can go well in to the afternoon but the ones I have been to usually say “lunch counter provided by……” so the auction house has made their own connection.
Just my experience, I hope it helps!