Well make sure they cut you a deal then. How many miles? What are they asking? Knock off about $1000 for the lack of MP3 wheels. Also, I imagine they didn't use the Dunlop SP9000 tires, which play a huge hand in the handling of the MP3. So lets just add this up.
4 17" Racing Hart rims @ $250 a piece = $1000
4 205/45/ZR17 Dunlop SP9000s @ $140 on tirerack.com = $560
Don't get screwed!
Chris