jose, I beg to differ on the "high collector value", not knocking this car but it is not a collector status car. I have yet to see any 350 Pontiac be considered a "collector" car. Even with low milage etc. I bought a 67 LeMans w/54k miles on it this past Jan. This car was/is close to #1 condition and due to the fact that it is not a GTO and is only a 326 car, I over paid at 15k for it. However, I was and still happy with the car. My point is, unless it's a 400, 421, 428, 455 high performance Pontiac, the collector factor has never been there nor may never be.
In fact, the OHC/Sprint cars are more "collector" than any 326, 350 Pontiac (with the exception of H.O. cars) has been to date. I say if you can buy it right, or maybe even a bit high and you are happy and want to drive it, then so be it. However, I would be careful with over paying, once you have, there is no going back...