Hmm..might be they ran out of stock. Amazon usually keeps deals such as this for a very limited time. Yeah, you can buy from that link. That link for me shows "Instant Order Update for xxx. You purchased this item on November 23, 2012. View This Order ". So, its the exact one that I bought
"That link takes me to a page that says they are 69.99, however this link (by the same seller) is 49.99 ??? http://www.amazon.com/Sony-MDR-V6-Monitor-Series-Headphones/dp/B00001WRSJ/ref=lh_ni_t"
This link take me to $49. to buy now.