For sale is a pair of Beyerdynamic T1 Tesla headphones. These are very warm and rich sounding phones, yet they are still detailed and punchy. They are also very easy to drive for pretty much any amplifier. I purchased these for use with testing various amplifier designs with the 600 ohm load, and, since the testing is done, they are not getting a lot of use. I am the second owner, and condition is conservatively ~8.5/10 (mostly for not being the first owner). Edit: price dropped to $850 plus shipping and Paypal fees.