These are from the USA, but are still relevant. Take a look at https://www.miata.net/…/Checking%20Out%20a%20Used… and this https://www.miata.net/…/Used%20Miata%20Inspection…
Some of the links in a series of postings I made a few years ago may also be useful. See It’s time I gave something back to the forum - General Discussion Forums / Readers Rides - MX-5 Owners Club Forum