ExpertFlyer gives present (and historic, for that matter) fares. As the page will say, just enter the same city for starting and ending. Simply enter a city in each country you're willing to consider (and the same city as 'selling city'). Note that the actual price will be a couple thousand dollars (U.S.) higher due mostly to airline arbitrary fees (YR, YQ) designed to make "base" ticket prices seem lower than they actually are.

I'm interested (but not very) in the country with fares so low it must be kept secret. If you snag such a deal and the rate desk of the airline doing the booking agrees with the fare, be aware that if you ever make a chargeable change to the ticket the AA rate desk (at least, but it seems to be stated in the rules) will recompute the ticket price in its entirety (using historic pricing as necessary) and may then catch the error.