My first camper was a 1990 T3 bought used in '94 and very clean - I had a brand new (budget) Leisuredrive conversion done by the factory, all new - bed, hightop, fridge, cooker, water, electrics etc and total cost was £8900.
From a quick online 1994 to 2017 money comparison:
A simple Purchasing Power Calculator would say the relative value is £16,250.00. This answer is obtained by multiplying £8,900.00 by the percentage increase in the RPI from 1994 to 2016.
If you want to compare the value of a £8,900.00 Commodity in 1994 there are three choices. In 2016 the relative:
real price of that commodity is £16,250.00
labour value of that commodity is £18,080.00
income value of that commodity is £19,110.00
Sure vans have come a long way but even so costs now for a basic VW camper factory or otherwise are very silly.
As someone else noted above though the only thing that makes buying one a sane decision is the depreciation stats - or appreciation in many cases thanks to VW's constant price rises. You still have to find/beg/borrow/tie up the money of course.
We will buy one when we retire but for now I will just continue to buy one in July and sell in September as we only ever use it over the summer.