Swap Meet Parts You Passed On and Later Regretted Not Buying

I have passed on alot of swap meet parts.

Just a year or so ago, a friend of mine dad passed, and let him and his mom around a dozen or so E body cudas, and alot of NOS part.
I helped him identify what I could, and bought one car off him.
He offered me his dads prized 440 six pack, shaker, 4-speed, dana, billboard, hemi orange, white gut multiple fender tag car for 20K.
I had the cash, no problem, but me and him had a good long talk, on how I was not going to rip him off for that low a price, and gave him some guidance on what to do with the car. He listened.
Yes I could have made alot of quick cash on that one, but I would not be able to sleep at night.
I knew his dad before his kid was ever born.
That's Solid, Sir! Excellent. The entire World needs more of that. This Mopar Thing We all Have, has become crazy itself also....I was in them over 30 years ago. When good,.solid cars ( running or not) and just about everything else was too. If I had not been collecting lil bits and pieces, and had closely known some Solid Brothers, I would not have the car I was able to Frankenstein together today. I helped a guy out last year. Rust free, damn near mint 76 Feather Duster deck lid. 300. Guy and me are tight now. Even though he's over a 1000 miles away. And he's helped me in return with some kinda hard to find stuff