I bought my Supra from Jurgen at JM Imports in July this year.
Pay JM Imports a small deposit of £1000 so they know you are seriously committed to buying a Supra and they will do all the work for you and take the stress out of importing. All you have to do is specify what kind of Supra you want, eg: NA or TT, colour, spec and for what budget. JM Imports will then use their agents in Japan to source you a decent Supra to your budget and check it's all good.
You yourself can also look on their website at Supras in dealerships and auctions, so if you see one you like you can mention it for them to go and check out and see if it's as described.
I recommend you use JM Imports as it's no stress that way and you know you will get a great example of a Supra
I love my new Supra, it's the best car I have ever bought and I had a Supra before it for 7 years