Kensington USB Device Sharing ShareCentral 2 for $8.50 shipped.  Here is a screenshot for your reference.  Shipping is free on orders over $25.  If needed, use this Filler Tool to pad the order to qualify for free shipping.  It provides the ability to share USB devices between two computers without all that plugging and unplugging (think of it as similar to the idea of KVM as described here).  Most places have this device for about $17 or more.