I've only been into Zs for two years and I already have: 
'72 240z in storage 
a '79 280zx slowly being parted out. Unfortunately all those parts are being stored in my garage  
two american racing rims with tires 
two 300zx rims with tires 
L20a crankshaft 
N36 SU manifold 
Twin flat top carbs 
'72 Hatch, good condition, trying to sell. 
'73 exhaust manifold 
and if UPS ever shows up, a custom header. 
  
Non nissan, I have piles and piles of spare parts for my Intrepid. and my mom's '87 mustang, including a svo turbo engine thats being rebuilt.