I have a subscription site that ships to multiple countries and I've been thinking about this too. Showing prices in local currencies would be good, especially

I have a subscription site that ships to multiple countries and I've been thinking about this too. Showing prices in local currencies would be good, especially since I can know where the customer is from geoip. But the reason I haven't done it is that if I actually charge in USD, but quote the price converted to EUR, since it's a subscription it might change over time. So you might sign up at 26.38 EUR / month but maybe in the future end up paying more than 30 EUR / month if the currency fluctuates. For two currencies I could just charge in the original currency and take the risk myself, but only for those my gateway would support. It would also might bookkeeping more complicated. I guess even for one-time payments the price advertised might differ a bit from what actually gets charged, since currency rates fluctuate quickly. Might be off-putting to see the price quoted as 29.95 EUR but then actually get a charge of 30.02 EUR.