Sunvalleytek via Amazon offers its Prime members the HooToo 7-Port USB 3.0 Bus-Powered Hub, model no. HT-UH008, for $29.99. Coupon code "IWTIRPCJ" cuts it to $19.99. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.30.) That's the lowest total price we could find by $10. It features built-in current surge protection, detachable 2-foot USB cable, and 2.3-foot charging cable.