Location: Parker Colorado, USA, directly above the center of the earth
The "full retail" price of the GMPP kit when it first came out was around $700 and some dealers were charging several hundred dollars to do the install.
When I first test drove a Sol in the summer of 07, the dealer in Vancouver Washington was charging $3000 for "aftermarket tires and wheels" and had marked up the price another $2000 just because they could.
I suspect that what you are seeing is a dealer who was making money while he could get away with it.
I am guessing that your car was sold in 2007. If it was sold in 08 or later then the dealer markups went away because the demand was dropping significantly during that period of time.
Rob the Elder
Green Dragon's chief mechanic
Carol's husband for 47 years
This is a 2009 Coupe GXP.
Well good thing I didn't buy it new then. It does have the chrome wheels however I thought that was the GXP standard.
Vehicle now resides in Calif. being transplanted from Cary North Carolina this month.
GMPP installed now verified from the valuable information learned from this forum.