What stays, what goes, when you buy a house?

What stays and what goes -- by law and custom -- in real estate in Massachusetts? Personalty or chattel is everything in the house that was not built into it or built specifically for it. Chattel includes washers, dryers, refrigerators, furniture, chairs, bookshelves, rugs, curtains, and such. Realty is everything that is attached to the house, wired