i would prefer a "complete" restorable car even with some rust issues.... if one can handle a grinder and welding it's less expensive as searching a interior and/or repaint.... i even would think , a oldtimer without interior and in need of a repaint is a parts car .... unless a +200k model... ???
Just to be contrary, let me differ: Sure, if you goal is a 100 point, perfect car, then that missing gearshift knob that was only used for a single year on a single model could be a deal breaker. On the other hand, when your objective is simply having a fun car to drive, one that would impress 99% of the people who saw it, an aftermarket shift knob will function just fine.
When the goal is to just get the car back on the road, rust and/or accident damage can take heaps of time and money to remedy. An unrusted/uncrashed car, even if it's missing a few bits, is usually the quicker, easier project.
Back to our Tiger: I see that the CL ad has been taken down, so someone snapped it up. Does anyone know Tigers well enough to be able to tell from the photos whether this car was genuine? I'm no expert, but believe that one difference between a 4-cyl Alpine and a V8 Tiger is how the steering column is configured underhood.