If you dont take preventative action, spare parts disease (S.P.D) can get progressively worse.
First it starts out as a set of hubcaps you don need - you don't have the steel wheels they fit on in the first place, since your Z has mags. Then it progresses to other bits you dont need, and if not treated at that stage, it degenerates into P.C.D. (parts car disease) and you find you have an un-restorable rusted out car taking up space at your house.
The sufferer of PCD is happy in their delusion that they have a whole car full of spare parts, and in their mind they will often think the car is not to far gone to be fixed. They will use the parts car as a storage place for yet more spare parts obtained from ebay, internet forums, and local classifieds.
At this stage the sufferer can become interested in other models of car, by the same manufacturer, and may buy a different type of car, say a 280zx, 300zx, or datsun 510, etc. The car will always need work, and the cycle of spare parts collecting will begin again for the new car, at which point the victim is beyond all hope.
Quick before its too late, send all your spare parts to me :classic: