Classic AKG K240s, I have had these for literally decades. These are the 600 Ohm version, which means they work great off a studio console, rack units or proper hi-fi, etc. - BUT they will not work (or hardly) off a mobile phone, or a USB-powered interface or almost anything battery-powered.

Horses for courses.

They are somewhat scratched and scuffed after so many years, but I am listing as "good" as they still sound and function great. Still one of the best headphone designs, timeless classic, etc., but I need to clear out a few things that don't get used very often.

Semi-open back, so not suitable for all studio monitoring purposes. Quarter-inch stereo jack only.