AC4 via eBay offers the Samsung 5-Foot microUSB Data Cable, model no. ECC1DU6BBE, for $3.38 with free shipping. That's the lowest total price we could find by $2, although we saw it for a buck less in November. It's compatible with any device that accepts a micro-USB cable.

Note: This item is new but may be missing the original packaging, or in the original packaging but not sealed.