u/as-per-the-plan

I'm at the early stages of looking into a van conversion, and I think I'd like a short length but tall van (I'm 6'2 and would like to be able to stand). On AutoTrader I always see quite a few listings of L2H3 Transits that are old BT work vans, generally around ~£9-13k without a huge amount of miles. Given their high supply has anyone here got one, or knows anything about them in general? Are second hand vans from large companies generally a good idea or not?

Failing that, are there any better alternatives? I know the Renault Master/Vauxhall Movano have an L2H3 variant, but they seem harder to come by

Thanks!