Why so many headphones for sale with less than 10 hours of listening time?

So then, I guess everyone here is an imbecile. Is that right?

I could easily avoid this topic but I do have a comment. If someone wants to purchase any piece of high-end audio equipment (at full price), then sell it after only 10 hours use, I'm happy to buy it from them at 50% (or less) of their original purchase price. That's the basis of this website. People are impulsive, and (sorry for the cliche) their loss is my gain. No one forces them to do it. Speaking of headphones, I purchased a pair of Stax 009's on this site for about half of retail. They were practically new and came with the wooden box, extension cord and cover. No complaints here! 

I listened to the Fostex 900 at an audio show and really liked them. I have found that satisfaction with headphones has a lot to do with the amplifier that drives them. Listening through a Blue Hawaii headphone amp is a lot different than plugging them into a budget receiver. However, the BHSE amp can costs many times the price of the headphones.