James, You might also want to look at the cached version of your page and then click on Text-only version and see if it shows up correctly. If it does, no need to worry from that perspective, but definitely worth checking from a usability, accessibility etc.

I think it makes sense to let the user select the currency and see the changed price or use the geolocation to automatically display that price. It would be a considerable amount of time and effort to try and make the different set of pages unique, so in short it does not make sense to make different urls for different currencies. However, if you plan in the future that you are trying to translate the content in other languages as well, then it's a different story. In that case you are targeting different countries and it's best served by country level domains for the countries you are targeting. I hope this helps.