Gamestation are usually ok.. Wierd.
A few weeks ago I got an as-new Dive Alert Matt for £10 or £15 (I forget... ha), which I don't think was bad.
Although they did have a loose Sega CDX/Multimega in the window for £300 (could have been £400, again I forget..), which seemed a bit steep.
It's usually a cool shop though, wierd.