LCD and Plasma TV wholesale Market Guangzhou

We are in great need of 17 and 19 inches LCD and Plasma TV of lager size, are there any large providers who can give us competative price? If possible we also want to import other items like Digital Photo Frame, memory card and related connector series. So are there any large wholesale markets of electrical products in Guangzhou?
What about the product quality in these wholesale markets?
Can I buy with much lower prices in these markets compared with other markets?
Do they know about foreign trade procedures? Would it be difficult to import from these wholesale markets?