As a mechanic, i personally hate mitsubishi's especially any that were built in Australia,
Delica's seem to go ok but i have never worked on one, but i will say that anyone i have ever talked to who owned an Express said it was a POS. and i would have to concur after working on a few.
ask yourself whats more important,
comfort ( engine and road noise are bad in L300/Express ) safety and reliability,
or
cheap to buy and cheap to fix ( which you may be doing allot of )
that said the Mercedes MB series vans are also rubbish but they were made by ssangyong.
if price is your concern, ide go with a half decent Mazda E2000 or Ford Econovan as long as it has at least some maintenance history and is in reasonable condition, as they are heaps better than a Mitsubishi
Mitsubishi build quality =