There are a few cars on that list that, while they never sold real big, I feel it is a real stretch to call them "awful". The Prowler was a great looking car. It only failed because hot rod people felt it was an insult to put such a weak engine in it.
The Thunderbird is also a very nice car. But Ford totally messed up on the introduction. After a big pre-production publicity campaign, they didn't release it until several months, going into years later. They kept working out several bugs. By the time they released it, enthusiasm had fell off, and many were concerned about the problems Ford had had with it. Plus, it was a little pricey for a Ford.
They both have appreciated in value, and are desirable collector cars. And I'd be thrilled to have either one.