I too have owned and walked away from a few that I should have kept or purchased.
Classic example: I once owned, for a very short time, a triple black 1966 Corvette 427 convertible. It was a 390HP, M21 4 speed car I picked up as a half done (previous owner) project. I finished it and insured it for one month. I was under 25 years old so the insurance company raked me over the coals. I couldn't afford to insure it. I ended up selling it for a fairly nice profit. If I would have kept it until recently.......my profit would have tripled if not quadrupled.
Like you said, hind sight is 20/20.
Well sewlow58, here comes my "GTO speak". Please, take no offense.
1970 GTO's did not have hide-aways:
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I once owned a '70 similar to this one. They all had fixed headlights.
'68 and '69 were the only years for hide-aways but the '70 did have the RAIV available ('69 and '70 only).
1970 was also the first year for the 455 engine in the GTO.
If it's a numbers matching 1969 RAIV/4speed rag top your watching rot away, they are super rare.
I'd be visiting him everyday until he got so sick of me, he'd sell the car to me just to get rid of me.
That GTO would become a 100 point trailer queen.
Sorry, I didn't mean to highjack this thread with all the GTO talk.