Replying to [KILOIA]:For prices, I think Shengzhen is the best places for electronic parts. Expecially for used IC, because they are easy to import. But it's hard to find a reliable supplier there. Zhejiang, Jiangsu is more reliable.
Replying to [KILOIA]: Most are in Shenzhen.Shenzhen is the high technology zone for electrical products.You mean part,then it should be Guangdong province.