Low quantity electronics like this have that problem. 600€ makes sense. The fact that you can buy a phone for much less than that, or a car for 15,000€ is a testament to what is possible at scale... When I saw single thousands quantities mentioned on the linked page I went "oh no..."
Also, as an italian, Jolla reminds me a lot of the word "Ciolla", which you can only guess what it's a slang for. That doesn't help.