Opportunity but need Opinions

[AJMarcus]

I am very familiar with modern Rolexes but have often considered a good quality vintage purchase. And I have a particular like for the GMT Master Pepsi. I have an opportunity, through a local collector, to purchase a GMT 1675 Pepsi from 1968. It has just been serviced and runs within COSC and meets all pressure testing. It comes with original box and all paperwork. It was a one watch owner who recently sold it to make room for a another Rolex. I am being offered it for $6500. What do you all think? An iPhone pic I took today is attached. Thanks very much