I wanted a USB 3.0 hub because my iMac needs more ports (and I need to be able to get at them more easily than poking around the back where I cannot see them!).
Found one on MA via GZ for around $50. Ordered Thursday afternoon. Delivered Friday morning to our PO Box.
Great service, that.
Good product too so far btw - 3 USB 2 ports and 4 USB 3 ports (why not just 7 USB 3 I don't know - they are backwards compatible I believe) each with an on/off switch. Works like a charm so far. Brand is 'Mbeat'.