Those people treat it as investment not a daily use pot, i remember 1 of the owner told me last time. He said it is better than invest a house/apt as the price rise faster and do not need a lot of paper work, not need through lawyer, no need to pay tax of selling and so on and can be liquidize faster tahn a permanent property like real estate...

If not mistaken his pot ~10yrs ago price~20-30k...

Anyway that only apply to the pot which is catergorize as "art"...now a lot "technical/skillful pot" but sell as "art" which not worth the price..

Zhang Zheng Zhong is now consider as State Master level of pot maker...so potentially to be the national level Master.