PLEASE HELP! I need to know the cost of the following cars when they were brand new?

I have no idea what the 1900s cars cost but I was around in the 1950s. A 1958 or 1957 Plymouth Fury ran about $2,000 with normal equipment. A 57 Chevrolet about the same. In fact the dealers were advertising the stripped down model for $1,795. My Dad had a 58 Chevrolet and paid maybe $2,200. The Corvette was a lot more expensive, maybe $4,500. By the early 1970's prices had climbed to about $3,500 for the cars you have listed. The 1966-67 Cadillac was about the most expensive car around and maybe cost $5,000 at the most. The Thunderbird was the same.