Seems you've already made your mind up to sell 'em, but if you try 'em on you might change your mind.
I bought 'em to replace my old, broken, and more expensive Shure in-ears, and the Klipsch S4's sound just about as good, with a tad more bass than flat (though nowhere near the amount of bass that gimmicky Beats headphones drown you in).
I'd still recommend the S4's as the best bang/buck, but my next pair will probably be the more expensive Etymotic or Shure's again.
The Klipsch S4's are also still rated #1 by Headphone.com btw
I have used ALOT of headphones and although I do not believe iBeats are superior to many, I also think that they are a VERY nice sounding headphone, especially if you like bass. They can be made to sound really nice with DSP Manager....I think Beats are discriminated against based on the marketing but overall are a huge upgrade coming from a set of stock or even intermediately priced headphones.