Posted this on another board, but thought it might work ok here:
People always talk about how much more a classic is worth then an aero truck at trade in. That's not relevant. What's relevant is how much the truck has depreciated.
Buying price(market) - Trade in price = How much the truck has depreciated
So how much are people buying 379's for these days? How much will they be worth in 3 years?
One thing that was definitely skipped over during that show was how much EXTRA you're borrowing. If you're paying 40k extra for that "classic" truck you're paying more interest on that 40k. That difference alone accounts for 10k.
I see decent equipped 2008 379's going for about 138k on truckpaper. I see similar specced 2005 379's going for 75k. I see a lot going for less then that, but I'll give the classic the benefit of the doubt.
138k - 75k = 63k
The truck has depreciated $63,000. Now using an average, $21,000 per year.
Now let's look at a 2008 387. With decent specs they seem to be going for 115k. A 2005? Around 65k.
115k - 65k = 50k
We can already see, the "classic" HAS DEPRECIATED MORE. It is not meaningful how much more you can trade it in for, but rather how much it has COST YOU TO OPERATE.
50k / 3 = 16.6k per year in depreciation of the aero.
You paid 23k extra for that classic, and you must pay interest on that extra 23k. Over 3 years you'll pay about a nice 3k. Divide that by 3 and you have 1k in extra interest.
21k + 1k = 22k
22k per year for the classic truck, vs 16.6k for the aero truck.
BUT WAIT, OH NELLY WE'RE NOT DONE YET!
We haven't even begun to talk about fuel!
Put the perfect specs on that 379/389 and you'll get good fuel mileage driven properly. Do the same for the 387 and you'll get 1 mpg more. Every time.
Averaging 140k miles per year, at 6 mpg the classic will use 23,333 gallons. At 7 mpg the aero will use 20,000 gallons.
3,333 gallons X 3.47 per gallon = $11,565 per year in extra fuel used
$5,400 in extra depreciation and interest for the "classic" PLUS $11,565 per year in extra fuel =
$16,965 per year the classic costs you over an aero truck.



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