I got some Beats by dre and had them only 6 months before they broke (shorted out in one ear). I went to radio shack, and they have some warranty deal where you buy something (in my case, 40 dollar pair of skull candy ear buds) and if they break within the year, they give you a credit for the cost of the product. The warranty was only 5 bucks extra, and you don't have to save your receipt... It was maybe 10 bucks for 2 years. Worth it in my opinion, especially when you take them in the cold and are actively moving at the same time. The metals/plastics in all ear buds will be more susceptible to breaking in the cold. Doesn't matter if they are 5 dollars or 100.
You could go through dogfunk.com as well and just send them back when they break...