Here's some links that may help.
https://forum.ih8mud.com/threads/should-i-buy-an-80-costs-of-ownership.124556/
https://forum.ih8mud.com/threads/80-series-faq-for-general-info-modification-and-repairs.84888/
The quick answer is, it's worth what someone is willing to pay for it.
Is it worth it...