The problem with those "American Dream Car" website cars is that there is no indication how old those ads are. The website itself looks very primitive, like it was made in about 1995, and the quality of the photography isn't much better. If you click on the link at the top "Click Here To Read About The Muscle Car That Got Away," the most recent posting on that page is from 2013. Clicking on the "Click here for a detailed inspection report" doesn't take you to a detailed inspection report. I would guess that none of the cars on that site are for sale today and probably haven't been for many years.
Yeah in looking at those prices. There’s a fairly decent ‘68 Impala wagon for $3,500. You couldn’t buy a swamp version of that car now for less than $8,000.
If you look at the link posted there are either four or six digits on the end before the ".htm" which I am willing to bet corresponds with the date it was posted. In this instance June 2008.