the k701 can be found for under $400 at various online stores. around $300 at northern sound & light, but they have pretty bad customer service.
personally i prefer the k501; it was recently discontinued and can be found for $100-$150 online still. i'm not the biggest fan of the akg kx01 headphones, but people say they sound different from the k240 series, for better or worse. there's a lot more options if you are willing to go to other brands, pm me for info.