Non-US residents *HAVE* to have a credit card to buy/sell on the RMAH So after a long day with both Blizzard and Paypal giving me no information, I've finally discovered why I was unable to attach a paypal account to my battle net account. Apparently Blizzard treats all transactions with Paypal as a "recurring payment," even one-time payments (such as the d3 digital download). What this means is, you need either a debit card or a credit card attached to your paypal account, in order to ensure that you have enough funds to cover the "recurring payment". In the US, debit cards are issued by credit card companies, while in other countries (such as Canada), they are not. Attaching a debit card to your account requires you to specifiy whether the card was issued by mastercard, visa, amex, etc. So if you're not American and you don't have a credit card (like me), you're out of luck.