Amazon offers its Prime members the PNY Attache III 32GB USB 2.0 Flash Drive, model no. P-FD32GATT03-GE, for $17.99 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $8.02.) That's $0.56/GB and the lowest total price we could find by $5.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.