Sorry for not posting for a while, been busy with work and whatnot.
The PO, unfortunately until recently when the sale took place, never realised the value of what he had and sold the original wheels, rear bumper, rear taillight to somebody, I got hold of that somebody and he did not want to sell the wheels back to me and also already ruined the rear bumper. Not worried too much about that because the wheels and rear bumper are still available from Porsche and popping up at EBay regularly.
After all the encouraging feedback here, I actually decided to keep my GT2 and try to save enough money quick enough to buy that 964 Turbo. However, there was a young gun I met today that literally begged me to sell him my GT2 for a really good profit, he even threw me a list of his collections for exchange which is awesome, then I realised the actual value of my car with the right person, you are all right, GT2 is still undervalued and I really think many people are like me, regardless of whether Porsche will release another GT2 manual box 991 or not, drew the line on 997. To me 991 looks too much like a VW interior wise and will never be a classic/collectable car. I told the young chap simple, "I do not want money, give me a pristine 964 3.6 Turbo and we will exchange key and title". He is busy calling all his friends tonight LOL!!