[DrSkeet]

How much do you think a used pair of beyerdynamic dt 770 600 ohm headphones cost? Need Earpads and headband padding replaced other than that all good. 

 

[PurpleAngel]

The Beyerdynamic EDT-770 ear pads usually sell for around $32-$35.
Generic ear pads from Asia sell for under $10.
Not sure on the headband.
 
Any idea on how old the DT770 600-Ohm headphones are?

 

[DrSkeet]

They're probably like 5+ yrs old. How much do you think a used pair of headphones cost?

 

[PurpleAngel]

I can't see a big demand for 600-Ohm DT770s.
I might pay $80 for 600-Ohm DT770 and would plan on spending another $50 for ear pads and the headband.

 

[Armaegis]

Used prices a couple years ago were usually $180-200 shipped in the US. It's probably come down a little bit since then.
 
If replacing the parts, I wouldn't skimp on the earpads but good headband replacements can be found on Amazon for <$10

 

[DrSkeet]

Do you think it would be ok to run off a dragonfly?

 

[Armaegis]

That's pushing it a bit for any usb device, but it should be serviceable.