Your yard and your workshop are two sides of one business, so the site treats them like two brands teaming up. The first thing people see is two doors, joined by your wheel logo: the Yard in red and the Workshop in white. Tap one and it opens into its own world.
Your cars for sale come first, each with its own page: all the photos, price, kilometres, your description, a call button and an Ask about this car form.
When you post a car on Facebook, it comes onto the website with its photos. When you comment "This is now SOLD", it moves to the sold cars. You never type a car in twice.
Sold cars sit small at the bottom, each saying "Sold, view our stock". Someone who searches Google for a car you have sold can still find you, and lands on what you have now. Everyone who comes to look at your cars also sees your workshop.