Oftentimes the estate sale company has a clause in their contract at end-of-sale to buy the estate, or in this case the unsold merchandise, for a fixed price. IF this sale is one of these situations, you can expect the prices to remain sky high, so the estate company gets everything not sold for dirt cheap, and then proceeds to make all their money at the back end.
I have also been at estate auctions where the house had shill bidders in the crowd, or had the spouse directly bid against attendees, so they could do EBay flips on items that were going for a good/great buyer's amount.
Many estate sales/auctions are strange.