Question: what are the most collectible porsches?
Answer: 1 – Porsche 935 Street (1 unit)
2 – Porsche 914/8 (2 units) ... 
3 – Porsche 993 Speedster (2 units) ... 
4 – Porsche 964 Turbo Cabriolet (4/8 units) ... 
5 – Porsche 991 Club Coupe (13 units) ...