Hi
OK, I did an override of /productmarket/form_price.php and in line 85 I just did this on the input field showing the product price:
value="<?php echo number_format(@$price->price_value,2, ',' , '.'); ?>"
It then show as 34,95
I then tried to update price to 12345,98 and it shows as that

If I look in database, it is saved as 12.345,98000
Does it not sound correct?
I then just have to find all the places where I would like to show prices, kilo etc. in a Danish way.
It could be, that I could also have used the
$this->currencyHelper->displayPrices
somehow, but could not get it to work.
I will try to see if I can fine tune it with some jQuery that updates the number format when tabbing out of input field, so that 12345,98 is updated for the vendors show to 12.345,98