Any problems that occured where on the earlier models, hes buying new, i have a trafic, if you are going to buy a model like the trafic, vivaro or primaster id say go for the trafic as you get more for your money i.e you get air con, reverse sensors and a few other bits compared to the vivaro which will come standerd, this may be different where you are but a plumber mate of mine has just bought one and vauxhall couldnt match.
Chris