BuyDig offers the Lexar 16GB S50 USB Jump Drive 4-Pack in Purple, model no. E3LXLJDS5016G316, for $17.99 with free shipping. That's $4.50 per drive, a buck under our mention from last month, and the lowest total price we've seen. (It's a current low for this quantity in any color by $12.) Each drive includes a sliding cover.