Help! Is this '03 for me and at what price?

[twest]

Hey friends, new to Porsches and new to this great site. Could really use your help on a fair offer range on this low optioned vehicle.

http://www.autotrader.com/fyc/vdp.jsp?ct=p&car_id=284789542&dealer_id=65589813&model=BOXSTE&style_flag=1&start_year=2003&search_type=used&distance=0&advanced=y&end_year=2011&transmission=Automatic&default_sort=priceASC&max_mileage=60000&address=90068&max_price=23900&seller_type=b&make=POR

If that link fails, it's an 03 silver w/ gray & metropole blue top. 25k miles. 2 owners, all books, Calif, Palm Springs garage queen. CD player. $23000.

Have had PPI = needs tires/align & frt brakes/rotors (dealer says $2410). Everything else aces. Really nice looking car. Other pluses - cover, complete foil bra (nose, door wells, mirrors) and extended Automotive SGI Platinum Plan Warranty good til Oct 2012 or 72k.

Have reviewed Mr. Fockes' amazing site (thanks!) along with kbb, edmunds, nada and ebay. I am certain this $23000 is high, but I'd like to come at him with a fair number as this car is pretty sweet. Losing sleep! Your suggestions or thoughts would be very welcome. Thank you!