Both headphones are sold as pictured (in original boxes). DT770 receipt is in the box but I no longer have K7XX receipt.
(sold) DT770/80ohm- (sold)
Owned for roughly 3 years, in good condition, no scratches, no shorts in the wire, cable is in good condition.
(sold) Akg K7XX- (sold)
Unopened, selling because I already have one that I'm going to keep. Would prefer to sell to someone outside of the US (seeing as massdrop only sells them to people within the US), but...