Just purchased a brand new pair of DT880-600, listened to them for about 2 hours, decided I like the sound of Grados better.
These are in brand new condition, will ship with original carrying case and box.
Asking $280 USD including shipping within Canada and the US. International shipping also available at extra cost. I accept paypal (we split the fees) or email money transfer for Canadian buyers. Local pick-up available in Toronto area.
PM if you'd like to see pictures, though as I said they are brand new.