I went to CeX and bought a couple of things.
For the PlayStation 3 collection I bought
Killzone 2 for 50p, and Japan Studio's
Puppeteer for £6. Killzone 2 I heard was the best one in the trilogy so I figured I'll go for it especially as I had already played Killzone 3. Puppeteer is said to be a hidden gem and was a game that came out just before the PS4 launched so it flew under the radar.
For the PlayStation 4 collection, I decided to get
Megadimension Neptunia VIIR, the tweaked version of the Neptunia VII game that came out years prior. Now there's actually a bit of a debate with regards to this particular version. Basically, it's a stripped-down version of the original with a mode dedicated to VR and the graphics being tweaked. I have a ton of Neptunia games to go through first (while I have played the trilogy on PS3, the future games are a continuation of the Re;Birth versions I believe) so I'm not going to start this one just yet but I'm willing to double-dip for the original if I can find it for a good price outside of IF's own store.
And last but not least they had a copy of Takashi Miike's
The Happiness of the Katakuris (カタクリ家の幸福), one of Miike's bizarre creations. No booklet for this copy but I'm not surprised given the age and the fact that you can barely find a copy even in HMV for this film (you can on Amazon and Arrow).