Fabio, I guess they are just "1 of 80" not "No.1 of 80". Not easy to tell by numbering them that way how many really got produced. My 5 cents says it's more than 80!
Still, I wouldn't mind one though.
Current Fcars: 360 Modena
Gone but not forgotten: 360 Spider, 575M, F430.
Other stuff: '71 Holden GTS Monaro, '80 BMW Alpina B9, '74 Porsche Targa, Caterham, MB CL500, Land Rover Discovery.