Price is almost exclusively set via the law of supply and demand.
Their is a big demand for VW Vans because of lots of reasons, they’re good, they’re fashionable, they impress the neighbours where a Transit does the opposite.
It’s not Rocket Surgery, everyone who’s ever had a hobby that needs moving stuff has thought about having a van, they’re wander into the local VW place and think “holy shit, they’re soooo expensive” and moan about it – they’ll be reminded that they could buy a Ford, a Vauxhall, a Citroen, a Renault etc etc etc for fraction of the cost “oh I don’t want one of them”
The upside of that is they can be fantasic value, if you’ve got the momey to spare in the first place – they’re the slowest depreciating vehicle in the UK and have been for years – buy one for £15k, sell it for £15k a few years later.