Extremely easy by the looks of things, you even get a scarf and admission to the Ajax museum thrown in for €62.
The Europa League final will be played in the Amsterdam Arena. May be a bit expensive but still: http://www.ajaxtravel.com/en/news/cat/ajax-voor-iedereen/post/en-uefa-europa-league-final-2013/
Game is done, Ajax win 2-3 and almost certainly win the Eredivisie title. They are now 5 points in the lead and PSV drops down to a third place.