What NON-Mopar car do you most regret selling?

I bought a 63 1/2 Ford Galaxy from a used car lot about 20 years ago. I went with a friend to deliver a car & while I was waiting, I saw the Galaxy sitting way in the back of the lot. I told my friend to find out the story on the car & get back to me. The next week, he calls & tells me the car is a none running vehicle, but they didn't have anymore info on it. I cruised by on the next Saturday & asked if I could take a closer look at it. The lot owner gave me permission & I wound my way between all of the cars in front of it. It was black in really nice shape with an aftermarket red cloth interior with white piping on the edges of the seats. Open the hood to see a 352 2bbl with power brakes, power steering & A/C. After I went over it thoroughly, I went back up front & talked to the lot owner again & he tells me that one of their former mechanics brought the car in & abandoned it when he left. He said he had obtained a title for the car in the lots name after it sat there for a year & tried to sell it. Someone took it out for a test drive & it quit running, so they wreckered it back & put it in the back of the lot. I finally asked what they wanted for the car & was told $300.00. I bought the car & trailered it home & started trying to find out why it didn't run. Fast forward 2 weeks, I've got gas, but no spark, I pulled the distributor cap & spun it over, the rotor wasn't turning. Pulled the distributor to find the gear is missing 5 teeth. Replaced the distributor, changed the fluids, got it running & drove it like I had stolen it. I won some best unrestored trophies with it & got a lot of thumbs up when I took it out. Other than the aftermarket interior, the car was too original to cut up. I drove it to car shows & on pretty weekends for about 3 years or more. I was at my local parts store getting gaskets for a Mopar engine build & a guy asked if it was for sale & I told him yes, he asked for my number & we went our separate ways. A week later he calls & asks if he & his wife can come look at the car & drive it. I pulled the car out, hosed it off & wiped it down. They show up, look the car over & take the car around the neighborhood. They pull back in my driveway & get offers me $4000.00 for it, I told him I had to thinks about it & to call me in 3 to 4 days. He calls back & ups the offer to $4500.00, I tell him to get the cash, or certified cashiers check & meet me at my bank. We show up at the bank, I deposit the check to make sure it was good & we transferred the title to his name at the same time. I miss the car because it was just a really, really nice cruiser. I saw it around the area for about 5 years & then it disappeared & I have no idea what became of the car or its owners.