Ocean Technology via Amazon offers the Unitek Aluminum 4-Port USB 3.0 Hub in Black for $6.99. Coupon code "DZOKLUTU" cuts it to $3.99. With free shipping via Prime, that's a buck below our March mention, $3 off, and the lowest price we could find. It features four USB 3.0 ports (one with smart charging), data transfer rates up to 5Gb/s, and a micro USB power port. Deal ends July 31.