there not the best vans , ebay  has  been full of them  with blown motors for sale
how ever like all vans its how its been looked after from new thats counts , if its cheap , and its been very well looked after and not been beaten to death then you would be foolish not to think about buying it 
its got the right miles on it and if it still smells new and never been smoked in and looked after like a car then it sounds ok 
do you buy a well looked after 1.6 thats been serviced to death or a  2,0 thats had its head kicked in every where it been driven ?