Is it really needed? Does anyone from the UK actually use ยฃs when buying/selling? My mind works in $s when it comes to domains and if you divide by 2 you get a pretty good idea of what it is in GBP after paypal fees. I think if you add currency conversion then you'll have to convert into every currency and if people really want that then they know they can fire up another browser window/tab and go to xe.com..