This is really simple, cheap and quick headphone stand IKEA hack. All you need is one of the plastic coathangers (or you can opt for different sorts of coathangers or hooks or such), something to saw it and something to screw it.
Mine were older type that they don’t seem to have in store anymore, but these should work just as fine.
Look a spot on your desk where you’d like to install one, saw suitable part with the hook portion out of the hanger and just simply screw it to your desk.
Quick, dirty ‘n cheap!