I am probably the only American here that would only buy in EUR. I travel internationally quite a bit so I have a bank account and debit card (through First Rep

I am probably the only American here that would only buy in EUR. I travel internationally quite a bit so I have a bank account and debit card (through First Republic) that gives me end-to-end conversion with no fees (no bank fees, no exchange fees, and refunded atm fees). In fact I usually get better than the going rate because my bank doesn't try to make money off the currency float. Your USD option, on the other hand, almost certainly comes with exchange fees, and a slightly higher price to start with in order to cover your margins if the currency fluctuates. In real life I've found that I'd pay 5-10% more if I bought in USD vs the native currency. That may be counting pennies, but pennies add up. That said, I'm guessing my story is unique, and that most people outside the Euro-zone will prefer a USD option. But I would recommend that you also price in EUR.