The probe was located in Vienna, Austria. Austrian courts do not necessarily recognize the authority of the German Bundesgerichtshof.
Zucca would need an Austrian lawyer to pursue this. This might not be worth the hassle and the associated risk.
The rules look similar, though.
Finding a case history such as the one from Stiftung Warentest but for Austrian cases would be optimum, though.
"Pacta sunt servanda" - this applies in Austria as well as far as I know.
Let's see, if the seller is dumb enough to relist this item again.
The question is if it is worth the hassle and the effort and risk to pursue this issue in an Austrian court.
Quick calculation:
same probe available via Amazon (used, very good) for 1200 USD which is close to 1100 €.
Calculation based on 1000€ ...
Gerichtskosten € 102,00
Anwaltskosten € 310,90
Vorbereitender Schriftsatz € 225,05
1. Streitverhandlung
1 Stunde
€ 222,53
2. Streitverhandlung
keine
€ 0,00
3. Streitverhandlung
keine
€ 0,00
Summe ohne Berufung € 860,47
Berufung (wenn notwendig) € 628,45
Ergebnis mit Berufung¹ € 1.488,92
You risk cost (just your cost) of 860€ for your lawyer only (plus the same amount for your opponent, if you do not win your case. If you need to appeal, cost will increase to about 1500€ just for your part of the story.
Unless you have insurance coverage which covers legal fees in the EU instead of Germany alone, you run a pretty high risk.
To me, this would not be worth it. But it's Zucca's call.
And no, I did not pursue the tape deck issue, either. Too much hassle.