SanDisk 4GB Compact Flash (CF) Flash Card Model SDCFB-4096-A10 $70.98

• Up to 4GB (4,000,000,000 characters) capacity
• For use in virtually all products that accept CompactFlash memory cards
• Non-volatile solid-state; no moving parts maximizes battery power. Data is not lost when power is turned off
• Operating shock rating of 2,000Gs, equivalent to a 10-foot drop to the floor (memory card alone)

Newegg is carrying this 4GB Compact Flash Card for $65.99 + $4.99 shipping = $70.98