Those are a bit of a mess. The mylar alone is enough to scare me off, but one has to ask oneself -- how did the original Arc assembly get busted? These things are old, and if they were mistreated at any time in the past, you want to know how much and by whom. It's not like there are warehouses full of spare parts for old Staxen - even owners of brand new sets have a hell of a time getting Stax to ship them replacement anythings.
All that adds up to a big stay away. I think a decent pair in much better condition would demand more cash, but that's largely because I know my pair is worth much more than any other $160 phone on the planet.