When I was looking for my Z recently I saw a few scam adverts on pistonheads, it seems pretty rife. I reported it to them and they did sweet FA, no reply to the message either, but it was a case of seller being "out of the country". Make sure you can 100% view the car before parting with anything, from what I've seen they recycle pictures and descriptions from other places (one of them was definitely sourced from the sold section on here). If it sounds too good to be true it probably is!