I'm selling the Model S because we don't need 2 high-end Teslas in our family. I am replacing it with a Model 3 Performance, which cannot utilize the 21" wheels. I don't see a big market for the 21" Turbine wheels, with so many Arachnids for sale. Looking through the ads, I would guess that these wheels would sell for $1000-$1500 at best, which is what I could discount from the price.