Relative value of options on a used Box...

[Turbo S]

Let's say you have two identical 2003 Boxster S's... color, condition, miles are the same.

One has Litronics w/washers, Bose, Headrest Crests, and Heated Seats for options.

The other has the same Litronics, Bose, Crests and Heated Seats, but also adds:

Porsche Stability Management, Cruise Control, 6-disc changer, and the Sport chassis options.

Now... for reference; PSM would have added $1235 to the original cost, Cruise was $570, Changer was $715, and Sport was $705. Total of additional options is $3225.

What is the real-world value difference today in the cost of the two otherwise identical cars for sale in the retail market?

Thanks in advance,

Turbo S