Ocean Technology LLC via Amazon offers Prime members the Unitek USB 3.0 10-Port Hub, model no. 973112, for $32.99. Coupon code "E54UILXO" cuts it to $26.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise shipping starts at $8.64.) That's the lowest total price we could find by $27. It supports transfer rates of up to 5Gbps.
iDsonix via Amazon offers the iDsonix 10-Port USB 3.0 Hub, model no. iDU3-H10P1-BK, for $39 with free shipping. That's $31 under the lowest total price we could find for a similar hub with ten USB 3.0 ports. Features include LED indicator lights, backwards compatibility with USB 2.0, an additional 2.1A charging port for smartphones and tablets, transfer speeds of up to 5Gbps, and a built-in surge protector.
ProTrend via Newegg offers the Hoo Too 4-Port Bus-Powered USB 3.0 Hub, model no. HT-UH013, for $10.99 with free shipping. (SunvalleyTek via Amazon charges the same via coupon code "J97WL93F".) That's $4 off and the lowest total price we could find. It's backwards compatible with USB 2.0 and features a built-in 1-foot USB 3.0 cord.