All my model cars are 1:24
And they are kits, which you have to assemble your self.
F40
F50
Porsche 930 Turbo
Alfa Romeo 155 BTCC
Citroen 2CV
Mercedes R129 SL
Peugeot 205 Turbo 16 Group B
BMW 3 Group 5 BMW 320 Jägermeister
Lately I started building tanks, but that's a other story