I've been asking myself the very same question and I think it'll mostlikely be the last car that I purchase once my season pass has been fulfilled. I have the 250 California as well as the 250 Testa Rossa, but I drive the California much more.
I bought one after I got 100% complete and had 17 million credits to burn.
Also, a bit of trivia, 1962 Ferrari GTO is actually a mislabel. The car in the game is a 1964 model. The 1962 model looks quite a bit different. I was hoping they would fix this small error in an update, but I doubt they will.
I bought, drove it for a while, bot never really got hooked on it. So I soled it on pretty quickly. It's not as special as it might seem, if you're asking me. Personally, I prefer the Cobra Daytona...
Well I am sitting on 26 million and have everything else that I want in the game so I may get bored and buy it eventually, but for now I have no immediate plans to get it.
^ Yeah, I haven't even tuned mine. I realized right after I bought it that it wasn't the '62 model I was expecting, as 88FoxBodyFan pointed out. I painted it and gave it wheels, took a photo, and that's about it.
If I'm going to drive a V12 Ferrari I'd rather take my Enzo-powered 288 GTO.