I can’t find any faults with this vehicle. Am I OK?
Not enough information. Do you want to buy a used 2017 Miata? Is it a leftover new one? The one fault it has is that road noise is high, but that is a problem with all cloth top convertibles. If it is used, who are you buying it from? If it is a private seller, why are they selling after one or two years? If it was a leased vehicle, you may be OK. A CarFax might be useful if the lessee had it serviced at the dealer.