I recently bought tickets to a concert in France (I live in Germany) and ended up not being able to travel and had to resell my tickets. Apparently according to French law you are not allowed to resell a ticket above its face value and so I had to resell it through the same ticketing company I bought it. They allowed me to set a price with up to a maximum amount which was less than how much I bought it (by a Euro or two) to cover their fees. It was also possible to name a specific buyer who would then get be able to buy your ticket.

Maybe there’s still another way for scalpels to game this system, I don’t know, but I’ve been to a few concerts in Paris and I’ve never seen scalpels hanging outside the venue selling tickets, which would be the norm in Germany, so maybe the system does work.

I assume the scalpers demand their additional payment first and upon receipt, name the buyer who can buy the ticket "for face value".

It's trivially easy for scalpers to game that system.