Best Buy offers the SanDisk 32GB Ultra USB 3.0 Flash Drive, model no. SDCZ48-032G-A46, for $17.99 with free shipping ($0.56/GB). That's the lowest total price we could find by $12.

Also available is the SanDisk 64GB Ultra USB 3.0 Flash Drive, model no. SDCZ48-064G-A46, for $34.99 with free shipping ($0.55/GB). That's another price low, this time by $17.