In reply to NaCl:
I bought mine in 2018, at 1 year old, hoping for it to last a long time (since insulating and lining and building internals costs a lot.).
Advice at the time was that Euro 5 shouldn't be a problem, as there are so many around, and any restrictions are likely to be stepped - ie. first ban earlier engines Euro 2,3,4, then later the Euro 5 and 6.
But here in the UK, the bans were outright: Euro 6 only. No Euro 5 or below. So I wish I'd gone with Euro 6 and paid the extra 5-9k at the time.
In parts of Europe restrictions are more stepped.
It is difficult to find a used van that doesn't look a bit beat-up, let alone be beat up. Commercial drivers seem to like trashing them. I spied and tried many before finding a reasonable looking and spec'd vehicle at a Ford dealer (via Autotrader) with a reasonable record and only 23k miles. 2 years warranty was worth a bit to me.