As said you have to be lucky to be hoping for a real, substantial profit on anything mainstream....AMG or not (exceptions like BS stuff aside).....you might show a profit when you sell.....but how much did you really make when you take , insurance, servicing/maintenance/repairs, storage and any interest your might have made on your money in high interest account off that bottom figure.
Cars are not investments unless you're in the high 6's, or into the 7 or even 8 figure range. Below that they are a toy which at best might not cost you much to enjoy when compared to a regular run of the mill car.
Also you either buy it to enjoy or buy it to sit and look at and not use, they aren't the same thing.