i spent around $63 to have enough to buy the eshop version. i did pay part of it with my debit card but i used play-asia because i wanted to spend paypal money first. you might save a bit if you use a debit card directly.
So how much did it set you back in all?
at play-asia they have a promo currently with a 5000+3000 yen cards for ~$74 which is very close to the current exchange rate. i wish i had waited for this heh. you end up with some extra cash for something.