ZipZoomfly.com offers the Kingwin eSATA / USB 2.0 Serial ATA Hard Drive Docking Station in Black, model no. EZD-2535, for $29.99. This $20 mail-in rebate chops it to $9.99.

With free shipping, that's the lowest total price we could find by $17, although it was $2 less back in September (for a few hours only).

This USB docking station connects most 2.5" or 3.5" SATA hard drives, up to 1TB, to a Mac or PC.
Rebate ends December 31.