1. Books: Books are common brand items, such as novels, biographies and art books. Books signed by authors or related persons can improve their collection value.

2. Works of art: Works of art include paintings, sculptures, ceramics and prints. The artist's signature on the work can prove its authenticity and value, and it can also become a part of the collection.

3. Sporting goods: Sporting goods signed by sports stars or athletes, such as basketball, football, sports shoes and rackets, are often regarded as treasures by collectors and enthusiasts.