I was considering a new van too. I actually put a deposit down on one but asked for my deposit back as the van was due into stock the week before Christmas but it still isn’t in and I was within the 14 day cooling off period. I still haven’t totally ruled it out but I’m now leaning towards keeping the van I’ve got, it’s 4 and a half years old with only 16k miles on it.
New van prices have been high since COVID, the worry is that with the current high prices there is likely to be more depreciation. Used van prices have softened slightly but with the high interest rates attached to used vans, it makes buying a nearly new van less appealing unless you can buy it without finance.
Leasing a new van will probably be more appealing if you don’t have much of a deposit in way of a trade in, this will keep monthly payments lower, although you will have a balloon payment at the end of the term. You should also be aware of the total cost of the van and not just if the monthly payments are affordable.
If you have a sizeable deposit and the price to change isn’t as heavy, buying outright would be the better option IMO.
The tax and NI savings on buying a van are also a consideration.
At the end of the day everyone’s circumstances are different, some people like driving about in new shiny motors with hopefully trouble free motoring and the piece of mind of a warranty, whilst some prefer to be more frugal and don’t mind running older vehicles which will require a bit more maintenance.