I bought these off ebay and they are in great shape, and have 500 hours on them. I put them on expecting to really be blown away after all the research I had done, but these are not impressing me at all so far. I have only briefly listened to a few songs, and I keep swapping back and forth between them and my stock Zune buds and do not hear a big difference, especially for the price. I am selling these things.