I recently bought 7 games for £14. They were pre-owned xbox games for the original xbox games. And you knwo what? They play really well and still actually look pretty good. Mechassault is still a good laugh on multiplayer (no live servers anymore though).
And on the train, I’m playing through Zelda Link to the Past for the SNES on my PSP. IT’s emulated and runs really well.
Who says you need to pay out £30 or more for new games, if you’re feeling a bit broke, get some old games, they’re good fun, and above all, remind you that gameplay is more important than graphics.