Here is my quick look into the data,
I have used a slightly more complex regression model to include the effects of age^2 as well as age by miles and age^2 by miles interaction
Basically
Price = Constast + Age + Miles + Warranty + Coup/Cab + ModelYear+X50+Age^2 + Age by Miles + Age^2 by Miles


The effects of the financial crisis were regressed on the background as a fixed factor, using 6/1/2008 as the break point

So what can we get out of it.
A. Miles and Age have the most robust effect on the price,
B. Moderate effects are produced by whether the car is Coup/Cab, and X50
F. Model year, warranty and miles by age and miles by age^2 aren't signficant

D. Effects of the warranty, age by itself and age^2 were robustly non-signficant e.g. exert no signficant influence on the price.

 

2003 996tt
Nov 2009 purchased
20k miles
43k $
Stock with a few options and fresh tires and sevice.

I love it! but may have paid too much, I don't know.

 

If you paid too much, heaven help the rest of us who already own them. Yours sounds like a terrific value to me.

 

That is a reeeaaally good deal

 

That's a killer deal.

 

Actually, according to the model, you car (assuming no warranty, 6 year old coupe, no warranty) you did quite good - the fit price is $48K.

Edit, the fitted price would be 47,663 once your car was included into the model

 

So my model was sufficient as none of those higher order relationships mattered. Great. I think we have now contributed a model of some value to those looking to answer the question of how much a car is worth--or at least a good, market-based starting point.

 

Indeed it was!

It was also interesting to see that the model year didn't matter either. Just the age and the miles. I think the model could further be improved by addition of the original MSRP and the vehicle condition into the account, but these would prolly be minor additions.

 

I tried this and it came within 1k of my purchase price at the time - I'm fine with that - 1k premium for a whole lot of fun.

 

I'm thinking about buying my neighbors 996 TT Cabriolet. 2005 with 25k on the dial and he wants $62,000 car is Black/Black.

 

Recently purchased a 2001 996TT
44k miles. Great condition. All service records. Car needs nothing.
$35,500.
Speed Yellow, black. Sport seats, yellow deviated stiching, yellow center console, short shift. Stock, all original. No warranty. Couldn't be happier with the car.

 

Great price

 

ya no kidding .. great price. hey ducgsxr where in texas are you?

 

All cars are dropping in price these days - No different in the non TT 996, no one said there were investments. Deprecieating Assets!

Once I got over that I slept better - but I look forward to getting a good deal on a TT ine day over the next year or two! Yahooo~!

99C2

 

Actually if you count it as 2010 (only 24 hours away) he got it within $3 using the formula listed earlier in the thread...

And if you count it as 2009 he got it for a savings of about $4100... So it is really how you look at the year

But yeah good price but scary that the math works out so well...