Have driven a LHD one in stuttgart, the owner had done the transplant 5 weeks before I drove it. It wasn't very quick at all, certainly not as quick as a 2.6 petrol. He was planning modifications to bring the power up to around 200bhp. I lost contact with him and don't know how he got on.
That aside, it looks like a clean car and if drives half as well as it looks, then it's probably worth every penny.