What's the problem with the listing? Make them an offer. Go right ahead. We don't know that they're being unrealistic. If it sits long enough, realism will set in
As for the washer and dishwasher not being tested. Would you honestly water test an appliance this old, if you knew as little about them as the seller likely does? It's in an apartment. They don't want water everywhere! Consider it non-functional. All these old appliances are in one of two categories, restored or un-restored. If this is a 1955 unit, it's not realistic to expect it to work.