depends on mods best best is pay a bit more for one thats been in the Uk for a while i.e someone else has taken the risk of importing it. The think with being the 1st uk owner is you dont know what it will be like and what problems you will have (if any) compared to one thats been in the UK a while and had any wrinkles ironed out.

I would say 4.5k at least for a fairly normal one and 5+ for usual mods.

Although some of the current owners are having to compete with 3k imports that have flooded the market so are their cars are being priced to try and compete and you may get a good bargain