Well, what do you want from your van?
I would prob go for the middle, not because it's newer but it's a high top, I love my high tops for storing stuff, poles etc in that space and be able to stand up, I constantly bang me head in the low roof ones 😖
It's good it's had one owner and if defo full service then it will be excellent, my vivaro was ex Anglian water, everything was changed on it, new seats, trim etc... And inspected every six weeks
( shame there wasn't a bargain like that when I last looked for a van )
But number 3 is overall the best buy looking at age and mileage - nice sign writing and it will look mint and last many years for just 2k
Darran