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Hmm, they used to say "just because you're paranoid doesn't mean they're not out to get you." I have not done any searches related to Barcelona in days. So About.com picks up an Orbitz tracking cookie days later and offers me great fares.
For weeks I was quoted fares of $1000 or more. Then suddenly a fare of about $750 was offered. I do wonder if the NWA and Orbitz computers take note of how many times you've looked up fares, and, like a mule trader of old, from time to time offer a special deal.