I've bought to Mr Sanborn in November 2009 a Grado GS 1000 is. The item was received but I did not get in the pizza box the warranty nor the invoice.
I would like to resell it and I need the invoice in order to prove that my headphone are a genuine one.
I sent you an email but maybe you did not get it. Therefore if somebody from Whiplash Audio could answer to me it will be very appreciated.