Cheers mate,
I did think that the paint didn't look right. I've spoken to the guy and there's no paperwork or history... No alarm fitted.
I've been talking to the owner of this auto https://m.ebay.co.uk/itm/nissan-300zx-twin-turbo-/172908614216?_trkparms=pageci%3A8f2f1131-b1b6-11e7-ba51-74dbd1809e7e%7Cparentrq%3A2079216515f0aa18f84eafdbfffaa4e9%7Ciid%3A3&_mwBanner=1
MOT history is good, pretty much standard, has a cat 1 alarm and body work is very good apart from some delam on bonnet.
If it doesn't sell, I may go look at it tomorrow early morning before work. Atleast this guy seems to know what he's talking about unlike some other sellers.