If you like to run with wireless sweat proof headphones you might wanna check put the S11-HD's at Walmart. These run around $115-$130 at most retailers but for some reason Walmart has them for $79. That is eBay low. And I've been burned from eBay before by getting a cheap imitation of some S10-HD's so I feel better about buying them at Walmart. I got some this week and am absolutely thrilled. The sound quality is better than the S10's and they are more comfortable.