Pretty sad, huh? They knew that when they said applianced inscluded in the listing, people looking at the house would think it meant the appliances that were in the house, not what junk they swapped out. I guess you need to list serial numbers to make sure you get what's in the house. They knew how they listed it, and the agent knew that they were expecting to get everything in the house. Now, did the sellers know specifically? Since they likely weren't there, I can't say they did, but their agent knew I'll bet. If it is indeed a completely honest mistake, once this is brought to their attention they should be more than happy to leave everything instead of selling it since they got top price for their house.