Update (7/17 5:55 PM): Buydig via eBay Daily Deals now has a 4-pack of 16GB Lexar JumpDrives for $19.99 shipped, this saves $12 over ordering individually from Amazon.
Update (7/17 1:15 PM): BuyDig via eBay Daily Deals also has a 4TB Seagate Expansion USB 3.0 Desktop HDD for $119.99 shipped (orig. $230). Rated 4.1 out of 5 stars from over 2,500 Amazon reviewers.
Newegg offers the Western Digital My Book 4TB USB 3.0 External Hard Drive for $129.99 shipped (Reg. $239.99) with coupon code EMCPCWC229. This matches the lowest price that we have ever seen for this hard drive, and is $20 better than Amazon where it is rated 4/5 stars by over 500 customers.
This external hard drive is a Wirecutter favorite: “The 4 TB WD My Book is the best desktop external hard drive for backup purposes because of its comparatively high reliability, speed, two-year warranty, and quality customer support.” It features WD SmartWare Pro automatic backup software and works with both Windows and Mac OS X.