EDIT: Sorry guys, I don't trade often with gamestop, and was unaware of the "cannot be combined with any other offer".
(This is kind of an add-on to the other deal)
Gamestop just updated their trade promos. On top of the extra $50 from trading in your PS4 (if you're a PRO member), they're doing another promo where if you trade it TOWARDS a new PS4, you'll also get an extra $50.
So, 180 + 50 + 50 = $285 towards a new ps4. I'm not sure if these deals conflict with one another, but if not (please let me know), this is definitely a good deal if you're looking to get a PS4 Pro!