Of all the supercars I've been fortunate enough to see in real life (Jaguar XJ220, Ferrari F40, Koenigsegg CCX, Spyker C8, BMW M1, McLaren F1!), there are still a few that I've only seen in pictures, and owing to their rarity, I may never see in real life. Off the top of my head:

- Bugatti EB110
- Ferrari F50
- Porsche 959
- Maserati MC12
- Cizeta-Moroder V16-T
- Jaguar XJR-15
- Pagani Zonda or Huayra
- Lamborghini Espada, Islero, Silhouette, Urraco, or Jalpa