I had a friend that had a MGB, mid 70s, and I drove it a number of times, and found the steering a bit stiff, but a fun car nonetheless. I do not recall her having a lot of problems. But then again, I love ragtops.
I had a car that was worse than any listed. A 1975 Lancia Beta. The sticker was $14,000 and change new. I bought it new for $7,100. Yes, about half the price. For the first couple months, I barely drove. Why you ask? Because I got it at a dealer 75 miles from where I lived at the time in the Pittsburgh area.
First night I had it, I took my Dad for a ride, we turned onto a road that gradually got steeper as you went up the hill. So, I thought I was down shifting into 2nd gear, and I got to a point where the RPMs were up and I was going 0 mph forward. I literally had to turn the car around and go back down the hill. Next day, I drive it back to the dealer, 75 miles each way, with a follow car to bring me home. Dealer tells me the transmission is not working. They have it one month.
I drive back up there, pick it up, get back home to learn they still did not fix the transmission. Most of the drive back and forth to the dealer was mildly rolling terrain, did not require really having a 1st and 2nd gear, which was the problem, no 1st and 2nd gear. Get it home, it does not work, next day, again drive it 75 miles with a follow car.
Yes, they have the car for a full 2nd month. I get it back and it is fixed. Now, I have to say it was the most fun car to drive. It literally drove like it was on rails. On a hairpin turn off an interstate, I did not have to slow down at all. Under 100 mph, it was super fun to drive, but it didn't have any umph to go much faster than that. Off the line, it was fun. And it was a head turner.
Then, a couple months later, I go visit a friend down in the Wheeling WV area. And driving home, the shaft of a spark plug drops into the engine compartment. So, I pulled over and left it at a gas station. I called the nearest Lancia dealer and they said they would come get it. Well, they left it sit at the gas station for over one month, and they charged rent/storage fees, they picked up the car and took a full 2nd month, and when I went to get it, they wanted to charge me $900+ for it all. I told them I would sue them, and I ended up paying nothing.
For the 1st 12 months, it was in the garage 9 months. After having it for about 1.5 years, I got married, moved to Tampa, FL. Had it in the Lancia dealer garage, a wire had broken off the AC compressor, which was made with pot metal. The mechanic calls me into the gargage, we are leaning over the engine, he says, 'Would you get rid of this piece of sh*t. Explains about the compressor being made from pot metal, otherwise junk metal. I saw a Corvette a day later, and traded the Lancia for less money than I still owed on it just to get rid of it. And it looked to be in perfect condition, not so much as a tiny scratch.
I think my father thought I was a genuine idiot after that event. Imagine buying a car, going up a steep hill, and coming to a point where you cannot move forward, you end up turning around and your father says 'get me out of this piece of crap'. LOL
With all the cars listed, I would almost venture no one had that problem DAY ONE!!!!!!!!!!!!