I've come to the conclusion that GS just isn't as thrifty as it used to be for buying used games. They seem to be holding onto the $19.99 price point for a lot of games that are old news. Don't see anything dip below that very often. I noticed this when I started my Wii U goal. A lot of second and third tier Wii U games that nobody really cares about, all $19.99 pre-owned. Other consoles as well. South Park the Stick of Truth? How long ago was that? Still $19.99. Bound By Flame? Does anyone remember that obscure budget release? Still $19.99. I picked up "Putty Squad" from Walmart at $10, it's an obscure sequel to an SNES game, released a few years back cross-platform. Still $17.99 at GS.
It doesn't make sense that they would keep prices up higher, on games that people are less and less likely to buy. I don't feel like just picking something up if it's gonna be $19.99. That's need to have it price for a modern game.