This question is impossible to answer without the specifics you just mentioned so there's really no reason to get bent out of shape. If history is any indication, you should pick up a BMW 1M, 2001-02 Z3M Coupe, late year Acura NSX, ,993TT or 993C4S. They are all holding their value extremely well. A car must be a limited or out of production model in order to judge the depreciation (& scarcity).
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