Best Buy via eBay offers the SanDisk 480GB Extreme 500 Portable USB 3.0 External SSD for $147.99 with free shipping. (Amazon charges the same.) That's $2 less than our mention from two weeks ago and the lowest price we could find by $11. It features read speeds of up to 430MB/s and write speeds of up to 400MB/s.
Adorama via eBay offers the G-Technology 2TB G-Drive Pro Thunderbolt Drive for $209.98 with free shipping. That's $30 under our January mention and the lowest price we've seen. (It's the best deal now by $59.) This features four 500GB 7200 rpm hard drives configured in a RAID 0 array.