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.