None of them follows the principle of auction on commission only, and where the house is selling its own goods, caveat emptor is the rule.
不論是先耕、建德、或是國人自創的「台北蘇士比」，都還沒有確立「委託寄賣」的經營型態，難免有拍賣自己的收藏品，「老王賣瓜、自賣自誇」的情形。