Guys, thank you A LOT for your helpful answers!
I wrote to them and they kindly replied to me.
My doubts are very simple (and I wrote it to them):
1. In their website I can't find any VAT number (it should be visible for law);
2. About their web address,
whois says that registry for their domain name does not publish ownership records, and IP location says Germany;
3. No PayPal option;
4. At the end of the checkout they give you 3 different IBAN telling you to make the bank transfer in order to complete the order, BUT the shipping cost is not included and not calculated!
Since the product I want to buy is very expensive (for me), I'm a bit in a worry
