Hm, this poses a few problems: miles vs km, and also just the arbitrary distances being a bit weird. What if instead of searching *by* distance we just allow people to sort results by distance? So on the result page the default sort is relevence, but you can switch to distance. Like amazon does:

![vb96](https://f.cloud.github.com/assets/21148/214430/4869a318-8420-11e2-87f0-f52ea08e4a44.png)