The price and MOQ is lower in Yiwu Market than that in Guangzhou. Because the suppliers in Guangzhou are mostly big factories, however,the Yiwu supplier’s scale is not so big, so their MOQ requirement is lower. Yiwu is the biggest small commodity market in china, there is nothing you can't find there. if you are "buy a big variety of goods but not big Quantity per item", definitely Yiwu should at the top of your priority. if you are looking for certain product, maybe you can try Guangzhou market.

Yiwu is biggest market-place in China (this says enough!), mostly concentrated on gift/decoration-like items, but there are also many other products catoegories, too.
It is definitely No.1 place to visit for your busines profile.

Guangzhou is also interesting, there are lots of clothes markets, and also other products, which shouldn't be avoided.