3.5g, €41, €11.70 per gram including whatever the local sales tax is (yeah, I got caught out with that on my first vacation to the YooEssEh, on this side of the pond sales tax is included in prices).
Cheap compared to Dutch coffee shops, that would go for at least €15 a gram. Will see if I can find any price lists where they're selling that stuff, might be possible that it's available over there.
Edit: Haven't found Candyland yet, but as a comparison I have found Skywalker OG at €16 per g, or $19.56 per g at current exchange rates, including taxes. On the site linked to in the OP, Skywalker OG is $11 per g plus taxes.
I envy you