Selling as-is with contents still inside is legal and common, particularly for an estate sale, but it does narrow the buyer pool toward investors and flippers who expect to deal with the contents themselves, and that narrower pool typically means an offer well below the $444,700 benchmark for a comparable, market-ready home.
A middle path exists too: donating or disposing of the bulk of the contents while leaving larger furniture in place for showings, which costs less than a full move-out clean but still lets buyers see the actual rooms.
The right level of cleanout is whatever the family can manage without delaying the sale. Get your hand-reviewed valuation from Joel Dyck.