What NON-Mopar car do you most regret selling?

First one that comes to mind is a 20th Anniversary 1984 1/2 Mustang GT350 convertible. I've had 2 of them, the first one I bought off the showroom floor when I was 21. Lost my job a few months later and had no choice but to sell it. The second one I bought in 2011, was a California car, absolutely immaculate condition. I bought it because I had always felt like I was cheated out of the one I had at 21 years old. Kept it for 4 years, then sold it for $3000.00 more than I paid for it, did nothing but regular maintenance and have fun with it for those 4 years.
I also had a 1980 GMC C15 2 wd that I paid $300.00 for in 1997 or 98, had a cracked block, dropped another motor in it and drove the wheels off that truck for 5 or 6 years, never let me down, but the tin worm got to it bad, like most square body GMs.
There are a few others, I had a 1987 Thunderbird with a 5.0 that was in exceptional condition, bought from an insurance company auction for $225.00, had very minor damage to the hood and grille. That car was a lot of fun to drive.