Honestly? I'm not enthused about suggesting either to a junior or amateur. They are both very green and I don't know where you are but those prices around here would get you a starved, wormy yearling. Not a nice, broke horse.
The mare is the nicer of the two, but she is spooky, tense and I would be planning on sending her to a trainer for a while before putting a junior or amateur on her. The gelding is really awful looking but at least he looks safer.
I would say, as a first horse, to keep looking OR plan on working very closely with a coach. Like 5 lessons/rides a week, full time program coach. And make sure you are thoroughly vetting either horse you choose, as well as trying her a few times, and at $1000, ask for a trial.
They say money doesn't buy happiness -- well happiness doesn't buy horses!