About 2.3 trillion 2009 cents of all sorts were minted. Compared with 5-10 trillion cents for each of the previous ten years and 4-6 trillion cents for each of the following years, they are comparatively less common. When you break down 2009 by mint and reverse, you're left with a few hundred million of each - certainly not rare, but again, uncommon when compared with other years. They seem to go for a slight premium on ebay for what that's worth. (What's that worth? Slightly more than a penny. Jeez, I crack myself up.)
Do I set them aside when I see them? Yes. Do I look for them? No.