I pay a pretty hefty premium to live in the only walkable neighborhood in Atlanta, Midtown, and even then I'd only call it "barely walkable." There's still not nearly enough density for me to spend a whole lot of time walking around.
Still, you can't put a price on having a grocery store, train station, liquor store, neighborhood bar, and cheap Mediterranean restaurant all within a 5 minute walk. As much as I'm paying, it's worth it.
Now if only I could convince my favorite coffee shop proprietor to open up a shop nearby...