Hi Phrozen,
If this car you are looking at is a chassis prefix HR33, then it is a basic R33 skyline, non turbo. All Turbo GTS cars are ECR33 prefix.
If the car is under 10 years old, it will need a ESVA test by VOSA / Vehicle Inspectorate. This can be not only costly, and brain damage, but since the rule changes last year, personal imports have been almost put away for good as the stipulation and new rules are as follows:
To Import a personal imported car for a non Vat registered motor trader you have to prove ownership in the country of origin for a period of 12 months prior to importation.
If the car is over 10 years old it does not apply and only needs an MOT to register the car with DVLA.
Before buying any car from an internet jap company here's a good tip before parting with your dosh. Ask them to fax you a copy of the actual auction sheet showing and accident repairs, actual mileage, chassis no etc.
If they fax it, you know that the chance of it being a straight car is good, if they wont send it , dont buy it, they are hiding something.
Hope this helps
Cheers
Stuart
skylines'r'us