BeachCamera via eBay Daily Deal offers the Sandisk Extreme III HD Video 4 GB Class 6 Secure Digital HC Memory Card, model no. SDSDRX3-4096-A2, for $9.99. With free shipping, that's $2.50/GB and the lowest total price we could find by $2. It features 20MB/sec sequential read and write speeds. Deal ends October 19 at 11:20 pm ET.