What happened to the reasonably priced project car?

The B bodies were the first to take off in price years ago then, the E bodies followed. People bought them up and, most people were drove out of that market due to price so, they moved on to A bodies and, now the same thing is happening with them. Look at the less desirable 73 and 74 Charger prices now...people can't afford 68 through 70 Chargers so they move on to other years that were cheaper but, now the 73 and 74's are going way up....