For those of you tempted to buy Sandisk Compact Flash and/or SD cards from eBay, be cautious. It seems there are many eBayers who have already been deceived by inferior quality, unpopular cheap CF disguised as SanDisk Extreme III as more than 95% of all 1GB, 2GB, 4GB and 8GB CF listed on eBay are counterfeit items and many have fake capacities.
Here's the link to the eBay webpage: Fake CF Cards