Amazon offers its Prime members the Lexar 32GB JumpDrive V30 USB 2.0 Flash Drive in Green, model no. LJDV30-32GABNL, for $8.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.02.) That's the lowest total price we could find by $4. It features a retractable sliding cover.