HD580 reporting for duty

lol

normally there isn't much to check when purchasing a used headphone

just make sure there is sound coming out from left and right, contacts on the cable and wear & tear of paddings

if got $$$ get the HD650 or HD600 though you have to spend more $$$ to get an amp to drive it but the experience is more rewarding than HD595 directly driven from MP3 player or PC

just my 2 sen