In 5 years time on a private sale I would hope to see you getting your money back.
As an example, in 2017 I paid £19,500 for a highly specced Triton 430. I good private sale would nearly see that return now.
As an example about longer term prices. In 2003 I bought a 2001 Triton 430 for £8,300 and sold it in 2006 for £8,500. he same spec and age of van has since then hovered around these sale prices.

Colin