It might be worth letting potential customers know that there will not be any currency conversion information before the purchase is processed (for credit/debit card transactions).
I originally looked up "my" cost of a lifetime premium package via the PayPal option, then figured I'd compare that cost against my bank's conversion rate. Fortunately it worked out in my case, saving me $5, but I didn't know until after the purchase processed how much I was going to be paying for it.
I get that you want to be paid in your currency of choice. I don't knock that at all. It'd just be nice to have a little more information on our end so we're not left guessing at details because guesswork sucks when it comes to money.