I need to sell a decent used car (a BMW from 2014), but since it's not a trade-in, the price I am getting from the official dealerships is ridiculous. Unfortunately right now I don't have time to market the car myself, let people test-drive it etc.
Is there a 'middle option'? Are there companies in Switzerland (semi-official brand garages specialized car traders....) who could perhaps offer not maximum possible, but still a decent price, and handle the sale in a hassle-free way for the seller?

Take a look at this website https://autozon.ch/en/index.php

Since the car already has some age you can try some other smaller local garages (I presume by official dealearships you meant BMW dealerships). Look around for larger garages with used stock of 10 year old cars.

That being said, if you expect to avoid the hassle of selling, you must expect to take a hit financially. Don't expect to be offered anywhere near street value - convenience has a cost...

A seven year old BMW is of zero interest to an official dealer, you may get about 1/2 of what similar cars are advertised for for a cash sale to a dealer.

Hi,

You could try TCS service https://www.tcs.ch/fr/cours-controle...e-voitures.php