newegg offers the Corsair 64GB Survivor Stealth USB 3.0 Flash Drive, model no. CMFSS3-64GB, for $59.99 with free shipping ($0.94/GB). (Amazon charges the same.) That's the lowest total price we could find by $26. This drive features a shock-resistant aluminum housing that's waterproof up to 200 meters. (We've seen same-capacity drives for far less, but they can't be relied on if you're planning on delivering a PowerPoint after rafting down the Amazon.)