I'd give the first one a really hard look if I was interested, it's been repainted at some point (Missing the blackout on the top of the front bumper) and is showing rust signs in the trunk corners.
Second one is a seller that's been reading too many other ebay ads. It's not worth $5500 in my opinion and unless the Marti report on the car confirms this "Not a mach 1, mach 1" story, it's nothing more than a plane jane fastback. I also like the "Q code" hood.
Third,well this one actually looks pretty nice. Again an obvious repaint (73 didn't see the option for a TuTone hood without hood pins) and the front spoiler looks to have been installed poorly (You can see daylight through a gap that shouldn't exist in one of the pictures) there's also been some suspension changes in the back. I don't think it's worth $17,000 but it is a nice car.