BuyDig offers the Samsung 16GB High Speed Class 6 microSDHC Memory Card, model no. MB-SSAGB/AM, for $9.99 with free shipping ($0.62/GB). That's the lowest total price we could find by $1 (most stores charge $15 or more), although we saw it for a buck less last month. It's designed to withstand water, shock, magnets, temperature, and x-rays.

BuyDig also offers the Samsung 32GB Class 6 microSDHC Memory Card, model no. MB-SSBGB/AM, for $17.99 with free shipping ($0.59/GB). That's tied with our mention from last week and the lowest total price we could find now by $4.