The 5th Most Expensive Food in the World

I very much disagree with this list. What about things like shark fin?

1. Saffron
2. Macadamia nuts
3. Beluga caviar
4. White truffles
5. La Bonnotte potato

http://www.eatmedaily.com/2009/05/the-fifth-most-expensive-food-in-the-world-is-a-potato/

*Here is a list from QualityHealth.com of what it considers to be the top 10 most expensive foods in the world.
http://www.qualityhealth.com/eating-nutrition-articles/10-most-expensive-foods-world