SanDisk 8GB Extreme Pro Class 10 UHS-I SDHC Card for $12 + free shipping
dz-tech via eBay offers the SanDisk 8GB Extreme Class 10 UHS-I Secure Digital High-Capacity Memory Card, model no. SDSDRX3-8192-A21, for $12.49 with free shipping ($1.56/GB). That's the lowest total price we could find by $2. This UHS-I (Ultra-High Speed) card features up to 30MB/s read and write speeds.