A friend of mine has a canel boat and was looking for screws and they cost
a fortune as they are marine grade SS.
The saem goes for teh yatch varnish he's been using so muvh more expensive
than the usual stuff.

The problem there is he must have mentioned the word 'boat' when buying,
that is a code word to all sellers to at least double, if not tripple the
price of their goods,

When i had a motorhome, i called in at a boat chandlers on the canal side
once, just to see what they sold,
they had a lot of exactly the same things motorhomes use (fiamma range of
roof vents and fans, whale water pumps and hose/fittings etc)

i thought the motorhome prices were bad, but blimey, almost double for the
exact same water pump i had in my motorhome,