These so-called "premium" french cars (and other generally shit brands) drop like a lead balloon. peugeot 607, Citroen C6, Vauxhall Signum, Renault Vel Satis (remember all the adverts on telly and sponsoring six feet under etc? Only ever saw one of them on the road!), Alfa 166 etc.

Jaguar X-Type's arent meant to be too good at holding their value either, mainly because people may as well buy a mondeo tbh