Is the big deal that this was a piano owned by Claude Debussy or is it just the same make and model or maybe just same make (Pleyel)? If the latter and it's unrestored then it's old junk. If it was owned by CD then it could be worth something and restoring it might actually diminish its value.
Here's a quote from the English translation that's unclear. "Ms Deknopper was astounded when she found that the piano, that was made in 1890 is the same as that used by the French pianist Claude Debussy, is in fact worth 18,000 euro."
Philosophers like to distinguish type from token identity. Quine's joke was:
Man 1 looking at Man's 2 yacht: "Wow, you have a great yacht, I got the exact same one!"
Man 2: "Sir, that isn't possible. If you got the exact same one, it would be sitting right here. Are you accusing me of being a thief?"
The ploy is on "exact one" and the Dutch article uses pretty much the same ambiguity, "identiek" - is it the exact same ONE or exact same KIND? ("Het is een buffetpiano uit 1890, identiek aan die van componist Claude Debussy.")
As for Debussy's Pleyel, I researched this recently as documented here
. I would be hugely surprised if the lady in the story knows the exact serial number Debussy's piano had when even published academics have a hard time referencing and publishing it.
So my money would be on "the exact same kind."
Finally, Dutch people like to brag about getting something expensive very cheaply. They can have five to ten minutes table talk just to reference who got the cheapest vegetable most recently. It's their equivalent of the Yorkshire Men sketch
and is a national hobby.
The Dutch are very proud of being frugal, and this headline isn't so much clickbait (I think) as reflective of one of their favorite pastimes. Pro tip: if you ever marry into a Dutch family and the "I got this [thing] cheaply, it only cost X Euros" game starts, one way to shut it down is to go "Oh really? Just last week I bought the same one for [quote half the amount]!" Actual tip I got from a friend at a time. (Ended up not marrying Dutch, hehe.)