Stolen from Slickdeals, a pretty good followup to last week's deal, traded in a 160GB PS3 today (1 of 3 that I own), got $175 in credit towards a new PS4 TLOU:Remastered bundle. I had $132 in Gamestop credit leftover from last week's escapades, so I put that towards it as well, so I ended up paying a little under $92 out of pocket when all was said and done.
Also, if you're a Pro Rewards member, in the phone app, there's a coupon for a free year of PS Plus for buying a PS4.
Pretty good deal if you have a 120GB PS3 or 250GB Xbox 360 that you want to make more than market value on towards a new PS4 pickup.
Added from Geneijen's post, thanks!
LEGAL - PS3 / XBOX 360 TRADE TOWARD NEW PS4 SYSTEM
Credit must be applied toward the purchase of a new PS4. Hardware must have all necessary components for trade. Not valid toward cash trades. Trades must be in full working condition to receive full value. Defective items may be eligible for trade at a lesser value. Trades subject to manager approval. Cannot be combined with any other offer. See store associate for details. No dealers. Offer valid in the United States, Puerto Rico and Guam only. Void where prohibited. GameStop, Inc. reserves the right to cancel, terminate, modify or suspend the offer for any reason without notice. Offer valid 3/16/15 through 4/5/15