Replacement key for Berlingo year 2000 – € 268?

Moin mitnanner, my mother has lost her (last) car keys. So she asked the dealer what a spare key costs. She was told: € 268. I don’t know about Citroen, so my question to you here in the forum: Is this really so expensive? Or is this a super noble key variant? Are there possibly expensive and inexpensive replacement keys versions? My mother doesn’t need a key to open the car by radio. She would be with a “handheld service” gsschlüssel” completely satisfied. Thank you for your information in advance – Volker