Says the man who never drives his Supra...
The main thing everyone forgets about GTRs and R32s in particular. Sure the purchase price is cheap but many people can't afford the maintenance on them. If they're original turbos they're generally not far away from going, suspension is usually f**ked too.
I'm in the progress of turning mine into a monster but it can be slow progress depending on what your line of work is and what other expenses you have!
At the end of the day, it all depends on what the guy wants to buy! Maybe like many of us 32's are his favourite? Of course there's pros and cons to all of them.