Hisgadget Inc. via Amazon offers Prime members the iClever 7-Port Aluminum USB 3.0 Hub for $29.99. Coupon code "6Z8538PK" cuts the price to $24.99. With free shipping, that's $5 off and the lowest total price we could find. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $8.80.) It features over-voltage and over-current protection.

Of note, also available is the iClever 4-Port Aluminum Hub for $12.99 via coupon code "SH6VIT3U". That's the lowest total price we could find by $3.