The GT versions are worth more, and that dark blue one was well known with an interesting ownership history. Plus it was the last UK car.
This one, IMO, isn’t worth what they’re currently asking and would struggle to make it to £10k if it went to auction. The harsh reality is that there are far better Maseratis (let alone other marques) out there for the same money, so it’ll only appeal to someone that dreams of owning an early, dark green auto Ghibli. And that person is rare.