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$75
sealed in box, brand new.
see review here:
http://www.amazon.com/Denon-AH-C700S-Reference-Headphones-Silver/dp/B000MVHRZS/ref=sr_1_1?ie=UTF8&s=electronics&qid=1238567866&sr=8-1
as noted here, the C751 are same model as the C700
http://www.amazon.com/Denon-AHC751K-In-ear-Headphones-Black/dp/B000WFZ1U2/ref=pd_bbs_1?ie=UTF8&s=electronics&qid=1238567859&sr=8-1
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