That red /6 B'cuda has been for sale on and off for at least 4-5 years on Moparts.com. I remember when it was "only" $5k... So, let's see, you can't sell your rot box at an already (for the time) overly inflated price, so, we'll just jack it up higher and higher each year and just hang on to it until some poor shlub bites
I just can't see spending anymore on that car than a few grand, and that would be for parts. Unless of course, the floors and rails were clean and then it would make a great street/strip machine.
BTW- If these cars pictured were worth the money the owners are asking for them, they would have sold by now. I have seen each and everyone of them for sale (including the white AAR) on other websites for a while now.
Out of the ones pictured, I would go for the AAR, but the column auto would be tough to get over. You would probably be better off buying a '72-4 'Cuda in very good condition for the same or a bit less than the AAR.