Is it possible that all the affordable project cars are now taken?
The secret is to like stuff that nobody else really wants! I really like Buicks, but unless it's a GS or something, they're just not that popular. 1970 Firebirds are insane. 1974 Firebirds are not. 1968 Darts are popular. 1965 Darts, not so much. Nobody wants a '61-'63 Thunderbird. They might think they're cool, but a sluggish boat that gets 10 mpg is not the cup of tea for most. Heck, I own a Corvair. They have always been cheap.
With that being said, my daily driver is a 2012 Focus that I bought new, and I'm cringing about replacing it in a couple years.