Best way to buy a van,
(unusually) I completely disagree with Spruce on many points.
Leasing/contract hire is an absolute No NO, from paying Vat, over priced, ridiculous mileage restrictions, to the final bombshell, them charging you for a complete respray on return, for a few small scratches (and it will get these),
Leasing is financial suicide,
Buying a better van that what you need is also a money trap. as is buying a van on finance. You lose both the depreciation and the interest on the loan.
You need to pay CASH (what you can afford), get the best bodywork but don't worry too much about higher mileage as for our work, high mileage is not an issue, having six working doors and a bit of size to carry and access equipment if more beneficial, a slightly bigger van than you think you need rarely proves a negative.
If you dont know a lot about vans take someone with you to look or have it checked by an independent mechanic,
For the fittings you will do a cheaper job by doing it yourself but finding someone to fit the tank/electrics/poleholders.etc and paying them, will get a better job done.
Whatever type you chose value for money will be the overriding objective, dont consider resale value as if its Ok you will probably keep it till it is no longer viable .
Signs to look for- scruffy interior and torn/damaged seats =Big Nono
Service history =good
Clutch, all our vans have needed a new clutch at some point, if the prospective purchase has had a replacement fitted recently that's a benefit, as the down time and inconvenience is annoying,
Tyres, 4 good tyres, preferably of the same make good sign the vans been maintained professionally.
The van market is competitive so Autotrader is a good start, just don't tell them you want to pay cash as retailers make as much money from the finance and part X as the sale, (I have been known to string em along by asking about finance to get a discount) you been Scottish probably will know about this

Happy huntin.
I appreciate that some will have a totally different opinion to others on this. And that's OK.
I have always bought a second hand van for cash. I know that if something happens to me and I can't work for a few months (like right now for me), I don't have to worry about paying a vehicle debt off. The van is just sitting on the driveway. We have always paid cash for our family car as well ever since we have been in England these past 32 years. Currently, the family car is a 53 plate Citroen Xsara with 115k on the clock.
However, on previous posts, Scottish has mentioned he was considering buying a new van. The high purchase cost of a new van does tend to lend itself to some form of finance.
When I worked for Citroën, lease purchase was a form of leasing I would always suggest as the van was registered in the user's name and was the owner's responsibility to do with it what he wanted. He could keep it and sell it or trade it in at a later date. Once the lease purchase period was up, the finance house had no further interest in the vehicle. In those days the base term was 3/47 payments + VAT. So the initial deposit was lest than HP.
I agree, never touch a standard lease or contract hire. HP is usually expensive due to the interest charges. HP usually required a larger deposit as the finance house wanted between 10 and 20% of the van's selling price and the full VAT up front.
All I'm saying is that whatever Scottish decides, he needs to fully investigate each option so he is fully aware of what he is getting into and what the end result is. He needs to investigate how he can depreciate the value of the van each year to get the best tax return.