Mazda Eunos help

[Mat...k]

I no very little about this subject but I have a Eunos 1.6 roadster which obviously is an import, I believe it to be imported in 2000 as that's what the log book ststes as the registration date., the log book states the year of manufacture as 1985, its on a G reg. We're they made in 1985?? Its all a bit of a mystery as I inherited the car. Its in insane condition, no rust etc, runs like I guess it would have as new, less than 100k miles,.wheels like new, momo steering wheel..
So odd dates and not a clue what it's worth, tried researching it but seems to be a minefield.. if anyone has any.words of wisdom I would be eternally grateful.. Many thanks in advance people..

[Mat...k]

Thanks so much for the input, much appreciated