@nicolascb Original Naits are worth much more than you might expect. They're a "thing". Really. IIRC, the one that Art Dudley spent time with had been "refurbished". Actually, much more than a mild refurbishment. I think it had been treated to a full artisanal refurb & tweaked to within an inch of it's life. The goal was to ensure it could function to the maximum limit of it's humble origins and design brief. I think he really liked it.
All this to say it's worth more than a couple of hundred. I expect you wouldn't have any trouble selling it.
A good place to ask about it's value might be pink fish media. There's a forum there and a lot of naim & ex-naim fans over there.