The Junghans Clock Company made very good clocks with heavy plates that wear very well. I hardly ever see one that needs an overhaul.
The one you pictured here looks like circa 1920 or maybe a little earlier or later. I would think you could get this clock for under $300. If the dealer wants more, check out eBay first.
It's A Deal! by: Anonymous
I bought the Junghan's yesterday and love it! Looking forward to many years listening to it's beautiful chimes. Got it for a good bit under $300, so I am happy.