See http://www.ashgroveauctions.ie, (Jigginstown , Naas,) for auction of Irish whiskeys (largely Jameson) from 1950s +. On Tues 26 May. Estimates €200-300-400. I shall not be bidding on this occasion,so the field is yours! Good luck.
Good Prices paid @ auction if you check the results. Basically around 300 euro a bottle which with a 20% buyer's premium came in at 360 Euro per bottle give or take.