Run a low budget auction of your goods after telling as many of your collecting buddies as possible that the auction is going to take place. Your heirs will get their 50% without a problem and the buyers will be very happy. It's better than sending the stuff out of town to a 30% commission auction house and losing your shirt on a bad day to a bunch of strangers. Yes, the buyer's premium is part of the commission whether you realize it or not.