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

Sense62, to address the issue of comfort on the Audeze, I have really enjoyed mine quite a bit over the few months that I have owned them and have used them hours on end with no issues with comfort, I use them with a Yamamoto H-2 tubed headphone amp that is very impressive in it's own right. Let me also say that I do not consider myself a headphone guy but did want a really good set in my retirement system for future reference and listening. I used the forums and reviews to choose the Audeze but I am sure there are a lot of other flavours in and around their price. 

Thanks again tooblue for the feedback on the comfort issue....much appreciated!

Why do all phono cartridges for sale have 100 hours of use?

In my case I read about headphones and heard raves from some people, so I thought I would try them out. Bought a nice pair and a headphone amp to run them. After listening for a while, and trying some very expensive headphones, I decided that I like listening to my speakers much more than any headphone I have heard. I would use them if I had to, but other than that I would pass.

First, I would be highly skeptical of any number of hour claims. Frankly, take them with a grain of salt. Next, there are quite a few headphones that initially sound impressive but with headphones, much more so than most other gear, listening fatigue sets in fast. For instance, those crystal highs turn out to be a nasty rising high end that makes the cans unlistenable over the long run. And that impressive bass, drones and drones. I also think that few people have adequate amplification for their headphones which quickly leads to disappointment. Finally, I would guess that many people buy headphones on line, based on reviews, and without any audition. By the time the return period is over, the honeymoon is also over.