[RB60]

I'd say one was a freshly restored '66 Shelby Mustang GT350H back around 1979-1980. The guy was asking $8500, but at that time it was a bit over my budget. I told a friend about it and he went down and bought it for $8000. He had it for a few years, then sold it and bought a Pantera.
Today, he has a 2011 Porsche GT3 RS, I have a Cobra and we still go to car shows together, but he often brings up that Shelby and says he wishes he'd kept it.
The only other one worth mentioning is a '70 AAR 'Cuda back in 1983, but just before I bought it, I stumbled upon a cherry '67 Mustang Fastback, and being a die-hard Ford man, I bought that instead. I pulled the original 289 drivetrain out and shoe-horned a professionally rebuilt 429 SCJ drivetrain out of a wrecked '70 Torino CJ in it. That one I could put in the "Ever regret selling one" thread.