Out of the 3 I'd go for the blue 71, sell the rims and tires and replace with your tastes. Body and paint are good. Engine looks clean. The green 71 has a dent on door and fender also needs a trans. But he has OBO open for dealing. Money one would save not buying from a dealer can be used to repair car. Just a thought for anyone looking.
Facebook go to marketplace and in search type in Chevelle.