I'm not sure if this has been suggested already, but when I view non-U.S. listings, I see prices given in pounds or Euros and not in dollars. Since I don't convert currency all that well, I think it might be helpful if, in addition to the pound/Euro figure, (perhaps in parentheses or similar beside it), I could see the equivalent amount in dollars before bidding/buying.
I'm not sure if UK and European/Asian members can view U.S. auctions in their home currencies, but if not, this might be a good addition as well.
Best wishes for many sales to all,