Why not just look on carsales?
But it depends what you call decent lol, decent for the money your paying or one that is decent in condition wise.
TBH, I don't think there are many "decent" series 1 R33 NA around anymore, most have really high k's and have been thrashed to hell by p platers, because most importer don't even import R33's anymore, let alone series 1.
9-11k can surely get you an NA series 2 R33 manual, auto will be a few grand cheaper. But you just gotta make sure you don't rush into it and buy the first R33 you see within your price range and if I was you, I'd just keep saving until I can afford a good R33, instead of paying 6k for one, then HAVE to spend another 6k to fix it
At the end of the day, your first car will be like no other cars that you'll own, because it will be something special. And I'm speaking from experience lol, nothing can replace my old NA series 2 R33, not even my R34 GTT now, just doesn't feel the same lol.