What would be the least expensive car to run in stock class? 08' BMW 135i or 95' BMW M3 or 16' Mazda MX5.
08' BMW 135i - no longer under warranty but parts are a bit expensive
95' BMW M3 - an old car can be truned into a dedicated solo car
16' Mazda MX5 - still under warranty could not change anything for the next 3 years or solo racing might void warranty?