Don't buy collections just because a painter or other artist is famous, let alone works of art such as paintings and calligraphy that have been highly speculated; Don't buy an artist's works of art, even those with high artistic value, just because he is not famous. As long as it is truly valuable and distinctive, paintings and other works of art are worth buying.
What does high opinion mean: honorific words, original opinions and unconventional explanations (1). Brilliant insight. Wang Song's essay "Qing Yi" in the Ming and Qing Dynasties: "The merchants think so, and the literati value ceremony more than ceremony.