Beeebo-us via Amazon offers the Dodocool PCI Express 2.0 USB 3.0 Expansion Card for $13.99. Coupon code "827UWZJE" cuts it to $5.60. Plus, Prime members receive free shipping. That's $2 under our mention from last November, $8 off, and the lowest price we could find. It fits any PCIe x1, x2, x4, x8, or x16 socket and features two USB 3.0 ports with data transfer rates up to 5Gb/s. Deal ends June 20.