Either I use my credit card directly or I use PayPal. You can always mail a check too, assuming you agree about who's going to pay the conversion fee. If you wanted to get fancy, you could get a cashier's check in Euros at a US bank, but I find most people do PayPal these days. For a transaction this small, a wire transfer is insane.
I would not recommend using a debit card like that though, and I'm kind of surprised that anyone would even do it. Credit cards are much safer for international transactions.