What’s the best deal you’ve gotten on cars or parts

Back in the early 70's, I bought a 64 Sport Fury 426 wedge motored 4 speed car for $500.00. I spent the better part of 4 years putting it back to original & then drove it to cruise nights & outdoor cars shows. I took it to a swap meet one Sunday because my DD was down & a gentleman made me an offer well over what I had in it. I sold it to him & saw it on the street for a few years & then it disappeared. I finally found out from one of his neighbors that he moved out of state for work. I contacted him & we've stayed in touch ever since. He still has the car & has made more improvements on it. He says he still drives it "like he stole it". It was one of the VERY few cars that I made any money on. LMAO