Okay, sitting here listening to these Beyerdynamic DT-931's and can't figure out why I'd ever want to trade these. I've done the same with my Senn 600's, Grado 225's and AKG 501's! And have enjoyed each and every one, just can't afford a collection! So once again my #1 phones are on the market. I've tried posting a few specific phones I'd like to trade for and gotten a few offers. I'm now asking what people have that they might want to trade. I'd mostly be interested in offers for headphones, but would also consider amplifiers as trade material. I do wish for good quality trades and would be willing to pay a cash difference for headphones of higher value. The 931's are in excellent condition and I have the original packaging. Let's here what you've got for trade!