That’s a hard question to answer – its old school 26 and some think they are ugly. I love them and miss my old one.
Some retro geeks might love it.
One day it will be rare and worth shed loads, so why don’t you keep it till its worth more.
At the end of the day its not what its worth, its what someone will pay for it. Also, what would you find acceptable to get for it.
If it was me Id sell mine (if I still had it) for £800 – it probably wouldn’t sell, but given a bike does not take up room and costs nothing to keep Id not bother selling it for peanuts.
Either ride if for fun, keep it for when you other bike(s) have a mechanical or stick it on the wall as Art.