One poster stated that at tao bao city I could possibly find some used electronics but he seemed unsure of exactly where it's located except to say it was on Baiyun lu.
Can anyone be more specific with directions?
Thanks to all who respond.
Redmoon43!

Taobao City's address is 448 Baiyun Lu, it's about 150 meters east of Beijing Lu and just west of the intersection of Baiyun Lu and Wanhong Lu (万宏路) on the north side of the street.

if you're using the taxi - just tell them Taobao on Baiyunlu...it's kind of a dumpy place though. Don't forget to stroll around all the junky vendors OUTSIDE the main building. I forget the bus stop - but if you ask any bus driver - they can usually also tell you which lines to take to get to baiyun lu, taobao...

Thanks Chris and laotou for your help!

Bus 55!