aliexpress and dhgate are often used for bulk sales which improves profit for sellers. Most single qty items on those sites have very low value ($0-5) and so the sellers can obtain better margins by selling in bulk because of savings from packaging and shipping alone. Only some sellers will allow you to order one unit of a single item...

Often you can find sellers on eBay who purchase in bulk and sell them at higher prices that take into account shipping costs incase just a single item is ordered.

EDIT: Trillium uses 'search':

http://www.ebay.com.au/itm/Mini-USB-Fan-Cooling-For-Desktop-Notebook-PC-Computer-Multi-color-Fan-Flexible-/140969715094?pt=UK_Home_Garden_Hearing_Cooling_Air&hash=item20d2732596

http://www.ebay.com.au/itm/Mini-Flexible-Neck-USB-Fan-With-Multi-Colour-LED-Light-For-PC-Laptop-Mac-B025-/280900216464?pt=UK_Computing_LaptopAccess_RL&hash=item4166f52690