Dealer extra cost of hard top roof

[nosbigkin]

Occasionally I check the classifieds for when the time comes for me to purchase my first elise.
One of my criteria would be a hardtop roof, but what I've noticed is that dealers are showing photos of hardtop roofs fully colour coordinated or stripped up and the advert then says "hardtop at extra cost", when surely the hardtop is part of the original car?
Is this common practice

[nosbigkin]

Sorry didn't mean new cars, I was referring to secondhand cars.

[nosbigkin]

Thanks for explaining friday passion