Have to agree somewhat on the factory prices, I had an 07 GT 500 Mustang that had aftermarket springs, it literally was sitting on the frame bumpers. So went to local Ford dealer to order new springs, they said I had to have the Vin number of car!? I had just looked at a King of the Road mustang in the showroom so I used that vin, thinking they would be expensive. Turns out each spring (4) were $31 each. Surprise Surprise, sometimes there is a deal.
They did sit lower than stock but well off the bumpers.