BuyDig offers the Samsung 16GB High Speed Class 6 SDHC Card, model no. MB-SSAGB/AM, for $8.99 with free shipping ($0.56/GB). That's a buck under our August mention and the lowest total price we could find by $4. It's designed to withstand water, shock, magnets, temperature, and x-rays.

Also available is the Samsung 32GB Class 6 Secure Digital High-Capacity Memory Card, model no. MB-SSBGB/AM, for $17.99 with free shipping ($0.56/GB). That's tied with our August mention and the lowest total price we could find by $5. It features data transfer speeds of up to 24MB/s.