B&H Photo-Video offers the Sony 16GB Class 10 Secure Digital High Capacity Memory Card, model no. SF-16NX/TQM, for $8.99. Add two to your cart, and the price falls to $14.98. With free shipping, that's $0.46/GB, $7.49 per card, and the lowest total per-unit price we've seen. (For further comparison, it's $1 more than last month's mention of a single card and a current price low for two cards elsewhere by $5.)