I wouldn't touch it with a barge poll!!!!
Sorry, this is only my opinion on Evan Halshaw. I traveled a 600 mile round trip to look at a VERY similar 350z, which was described as immaculate, low millage and one owner. I was told it had been traded in against a new 370. When I got there it was a dog! The front looked like it had been driven for 300K miles on gravel tracks. I found a letter from the 1st owner complaining about some missed services (that now seem to appear in the log). I also found the phone number of THE SECOND owner, so gave him a call. He'd bought it from a trader and then sold it on to another trader. Therefore Evans had bought it trade and lied about its origin. Also, watch the warranty - the small print states max reimbursement of £250.. not worth the paper its written on. It's not just me, I have had friends tell me about similar experiences...
This is only my opinion, but there are loads of other places I'd look first...
Good luck, it's well worth finding a good one... awesome cars!