I teach high school, I want to make a point that while luxuries cars
may have a certain appeal, their cost far outweighs the value. The
particular fact I am looking to demonstrate this with is the annual
cost of upkeep for such a vehicle. For instance if the cost of a
luxury car is 80,000 and then 3 years later it's value is 30,000 then
it is costing its owner over 15,000 dollars a year. Meaning every day
it sits in the driveway the clock is clicking away at a rate of 45
dollars a day, 2 dollars an hour every hour. Who could afford to sleep
at that rate.

I need specific (not exact but ballpark price) for a good example of
this Ie an BMW Z8 2000 costs 130,000 and then 3 years later sells
for...

Hi barrys. For this kind of information I recommend nadaguides.com. It
will provide you with current dealer retail information. Here is an
example for a 2000 BMW Z8:

http://www.nadaguides.com/Values/ValueCategoryReport.asp?UserID=53070E46C9A5B&DID=37680&wSec=1&wPg=1207&CategoryId=1&MakeId=1026&VehicleId=18400&Year=2000&ColorId=

I suggest Edmunds for this-heres a page showing costs over 5 years
starting from new. The costs include
maint/depreciation/repair/ins/financing etc

http://www.edmunds.com/new/2003/bmw/z8/100187551/cto.html?tid=edmunds.n.prices.leftsidenav..4.BMW*