Sounds fantastic and, if you were looking to sell, I have no doubt it'd make a significant sum. If you were to go down that route, we'd recommend selling it as it is via a specialist auction company like The Market, Collecting Cars or Anglia Car Auctions. You could also contact a specialist dealer directly – although a more desirable Mk1 (and a limited edition), KGF Classic Cars recently sold this example for more than £20,000: www.kgfclassiccars.co.uk/vehicles/23810/

Your car will still be increasing in value, though, so you might wish to keep hold of it for now. You're doing all the correct things to keep it in good condition – an annual service would be wise, while we'd recommend the cambelt should be changed to prevent damage to the engine (it's made from rubber which deteriorates with age, even with limited use).

Of course, the other option is to give it a good service and start using it. It won't help its value, but it'll continue to be a low mileage MX-5 in excellent condition, and you could get a lot of enjoyment out of taking it to classic car gatherings or simply enjoying roof-down motoring.