Gtr advice

[sone]

Considering a Gtr as a weekend hoon and occasional track day car and looking for advice.
Budget is around 50k ish so what sort of car age , mileage condition etc can I expect to find.
Strangely Ive not a clue where to buy from, should I go to a main dealer or private. Am I going to get any sort of warranty.
Any guidance greatfuly received I've done the YouTube and other routes already.

Thanks in advance

Steve

[sone]

lol cheers