Cheapest FIFA 14 I found so far
requires Japanese PSN plus which is very easy to create
as for psn plus membership, they offer free trial for 14 days upon registration
on top of that, you can get contrast game as bonus http://au.ign.com/games/contrast-151954/ps4-129642
I'm still figuring it out where to find cheapest Japanese psn (probably play asia)
and still need to test if the game has english option
I don't know if it's a bargain as Japanese PSN cards are overpriced
UPDATE ————————————————
I tried to download the demo myself
Turned out, it doesn't have language option, unlike the English version which has 4 languages
But you can still play the game as the signs are pretty clear and player name, scoreboard etc are still in English
Cheapest card I found so far : http://www.japan-codes.com (still expensive)
Better just wait for FIFA promotion to enter us psn market
Pretty good price! Hopefully someone can confirm if the English option is available ( I tried googling but no found info), and maybe even a better place to get psn cards than play asia