My recommendation is to check out Edmunds.com and price the car with options. This will show you the invoice and corresponding MSRP by option.
For example:
Base Model $Invoice XXXX $MSRP YYYYY
Option 1 $AAA $BBBBB
Option 2 $CCC $DDDDD
Total $total invoice $total MSRP
Given the economy, you shouldn't be paying over invoice, which is the dealers "cost" of the vehicle. Dealers get holdbacks at 2 - 3% of the total invoice price and also corporate incentives for selling in high volume that will make up for the initial loss of selling below invoice.
On Saturday, I bought a base with sport package and floor mats which had an aggregate MSRP of $33,740 and an aggregate (with options) invoice of $31.7K. We settled on $31K or, $700 below invoice. I also know of someone who bought an Infiniti G37 for $1500 below invoice. Perhaps if I were even tougher, I could have squeezed another couple hundred dollars.
The only thing is there aren't any rebates for the new Z. You just have to find a dealer that needs to move inventory. Also check out
CarBuyingTips.com new car buying guide, avoiding dealer scams, new cars, used car buying which teaches you how to negotiate. Very informative. - BTW- I used to sell cars back in college. Hope this helps.
David