Wow that seemed to move quickly! Congratulations on your new purchase.
I would say though if you are buying a converted van it’s worth considering that ( if done professionally) the conversion cost should be at least £10-15k when done on top of the van price so if you /2 as second hand then at least £5-7.5k of the price is the campervan, plus wheels/style/VW camper markup, so what you will be paying for a base van at an all in price of £25k is much less than you’d think, then you need to consider if paying £25k for that van is the right think to do.
We went through this when looking for a van to convert and ended up buying a new van as the van is the vehicle you are buying so made sense to pay a premium for that as a starting point. When buying a converted van it gets very difficult to understand what exactly you are paying for (20k van + 5k camper, 10k van + 15k camper, 5k van + 5k camper + 15k VW premium etc!).
I would say I think it is still a buyers market at the moment so there should be some good deals out there and buying a T5 (or T5.1) is in many eyes seen as a sweet spot!