In reply to Siward:
Merc Sprinter = V. Reliable and fast, 2000 - 2005 can be a bit "scabby"
VW Crafter = Sprinter with a crap engine
Renault Master = OK to a point, turning circle of a supertanker
Vauxhall Movano = Renault Master
Renault Traffic = God help you if the starter motor packs up and you haven't got a ramp and a big box full of tools.
Vauxhall Vivaro = As above
Merc Vito = E Class with a van body, possibly a bit small
VW T5 = Overpriced You buy the lifestyle not the van (complete with Lei garland hung from the mirror)
Ford Transit = Better than they used to be, but, agricultural and will have been nicked by pikeys, before you finish reading this!
Iveco (various numbers) = Strong but fragile, brittle would be a better word, surprisingly nice to drive.
All commercial vehicles get the wheels "driven off" them. Everyone knows the fastest thing on the road is the firm's van. A van is only as good as its service history, look for regular oil changes and plenty of bills.
Cheers Adam (Ex commercial vehicle mechanic)