PlayStation Store discounts a selection of Square Enix titles for PlayStation 4, PlayStation 3, PS Vita, and PS Plus. A couple of best bets:
Deus Ex: Mankind Divided: Deluxe Ed. for PS4 for $11.24 (pictured, low by $34)
Final Fantasy IX for PS4 for $12.59 ($8 off)
Use some marketing and merchandising tricks to make more money with less sweat.