It is usually more expensive in the dealer garage than in a garage that does repairs on any car make.
For the 208 for the yearly service (mostly oil change, plus a few other things) it is 200€, but back when I had the 106 (16 years ago) it was rather a little above 100€.
At that time it was already cheaper to go elsewhere for just an oil change. Maybe it is a good compromise to go in a known big garage like Midas, between the make-dealer prices and the local garage without invoice/VAT