Adorama offers the SanDisk 16GB Extreme Pro CompactFlash Card (pictured), model no. SDCFXP016GA91, for $59.95 with free shipping ($3.75/GB). That's the lowest total price we could find by $40. It features read and write speeds up to 90MB/sec.

Also available is the SanDisk 32GB Extreme Pro CompactFlash Card, model no. SDCFXP032GA91, for $99.95 with free shipping ($3.12/GB). That's the lowest total price we could find by $100.