This deal has ended.
Update: This is now out of stock. Buy.com drops the price of this Kingston 4GB Secure Digital High Capacity Memory Card from $19 to $7.95 with free shipping. This beats the next-best total price we could find by $3. This comes with a lifetime warranty and works with SHDC cameras, camcorders, etc. There is no sales tax (except CA, MA, MD, NY, TN).