The k401 was $250, the Senn was nearly $500.
I'm thinking of buying them, but from the price of the k401 I can buy a pair of new k601. (Don't know which sounds better.)
The Senn is really rare, it's a 50th anniversary headphone, but is a found here, in head-fi. It has HD4xx drivers, and the hd580/hd600 sounds better.
tranhieu: Or were you asking the price of the K1k?
I tried them out in the shop before i bought them, but i don't know, why it has wrinkles. (It still smell new)