Where would you suggest to buy small electronics in Shanghai?

There are many shops selling the small electronics and I will list some official shops for you.
Gome (Changning Branch): no.986, Changning Road
Gome (Yishan Branch): no.488, Yishan Road, Xuhui District
Gome: no.1288, Zhenguang Road, Putuo District
Suning (SH Zhaojiabang Road Branch): no.995, Zhaojiangbang Road, Xuhui District
Suning (SH Chengshan Road Branch): no.1993, Chengshan Road, Pudong New District