Here's some curveballs for you:
Alfa Romeo 147 GTA
Audi S3 (Mk1)
Audi A3 3.2FSI
Mazda 3 MPS
Golf R32 (Mk4)
All these seem to be heading towards the £5K mark now. You might even be able to find an Astra VXR around that money but like the Focus, I personally wouldn't as it'll be bottom of the barrel.
Also note that all of the cars above with the exception of the S3 and maybe the MPS are likely to be a bit thirsty.
Alfa Romeo 147 GTA
Audi S3 (Mk1)
Audi A3 3.2FSI
Mazda 3 MPS
Golf R32 (Mk4)
All these seem to be heading towards the £5K mark now. You might even be able to find an Astra VXR around that money but like the Focus, I personally wouldn't as it'll be bottom of the barrel.
Also note that all of the cars above with the exception of the S3 and maybe the MPS are likely to be a bit thirsty.