A pair of replacement wiper arms for a Galaxy: ~25 quid from Halfords. .
A _single_ wiper arm from a VW dealer (Galaxy=Sharan=Alhambra) 18 quid plus VAT. .
A pair of nylon-backed blades-only from a local indepenndent garage: a few pence over a fiver. Fitted to the arms in 5 mins. Perfect.
Do most people now pay so much over the odds and put up with extra new parts they don't need?