Buy.com via Rakuten Shopping offers the SanDisk 16GB Cruzer USB 2.0 Flash Drive, model no. SDCZ36-016G-A11, for $9.99 with free shipping. That's $0.62/GB, the lowest total price we could find by $3 (outside of the price below), and the best shipped price we've seen for this drive. (For further comparison, we saw it for $7.99 with pickup in September.)

A close price: DZ-Tech via eBay offers the similar SanDisk 16GB Cruzer Pop Paint USB 2.0 Flash Drive, model no. SDCZ53A-016G-A11, for $10.49 with free shipping.