I did some research.
If I sell the bass to someone living outside of the EU. Let's say USA for instance.
I don't have to add VAT to the price. So the price I sell the bass for is 294 euro.
If I sell the bass to a person living in the EU. Let's say UK for instance.
I have to add 19% VAT to the price. So the price I sell the bass for is 349,86 euro.
If I sel the bass to a person or company with a VAT-identification number living in the EU. Let's say UK for instance.
I don't have to add VAT to the price. So the price I sell the bass for is 294 euro.
It then is a so called intra-communautair transaction.