Amazon offers its Prime members the Sony MicroVault 32GB USB Flash Drive, model no. USM32SA1/B, for $17.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise it adds $8.) That's a buck under last month's mention and the the lowest total price we've seen. (It's a current low by $5.) It features a locking cap and USB and microUSB connections.