Here's another sweet deal similar to last weeks PS3/Xbox trade in.
Take in your ps4 phat grade B or above along with five old games (no Fifa 14/15 allowed) for a half price 1tb pro.
Grade B doesn't require a box but to avoid hassle just ensure you have all cables with you and console and controller are in good clean condition.
Would be beneficial if you pre-ordered your pro as stock is limited-place where I have my order said they have 50 in stock but 47 pre-orders.
Also pre-order means they can't try and bump you for a bundle "deal"