Quote:
of course, bying an other car hardly saves money.
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My spreadsheet takes this into account. All you have to do is set your current car's value to what you would get if you sold it. All cars are treated at their current value caluclated from a depreciation table so only total ownership cost is considered (buy car, drive it, sell it, total expenditure).
Here is an unrefined copy I have on my work machine...