This is such an insanely generic question to ask with a multitude of factors that will determine the $. Rather pointless, really...
Look on Cars.com and Autotrader for vehicles that match your criteria. Throw them in an Excel document and look at the asking prices and go from there.
That should easily give you a good idea of what you can expect to pay for a car of your desired criteria.
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'16 M3 | '23 718 Spyder
Past: E92 M3, F87 M2, E39 M5, etc
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