I started on DB with a 3/4 Zeller in the mid/late 1990s. Ended up selling it to Jack as I "just had to have that vintage German flatback". Reel forward a decade or so and I bought it back from Jack. Lovely bass and the vintage thing is fully out of my system, the Zeller actually sounds just as good at a fraction of the price.
So, to cut a long story short (I lost my mind), these are bazzing instruments and someone should buy this from Jack asap and enjoy it bigly.