First off, what a great price, they also would consider a lease for no less than a year too. So you could also free lease it to see if it really is the right horse for you. I am curious too as to why she is so cheap. It makes me wonder if there is an underlying problem. If you are serious about this horse, I would really recommend a vet check in this case.
1: This jump makes me a little nervous. She really hangs her legs over the jump, and looks like she may have rubbed against it.. which is dangerous in jumping that height over a solid fence. If you do get her, work with her on those knees before trying this yourself.
2: She just looks green doing this. She's learning. She's very willing though, which is great.
3: She looks so green over this crossrail! She doesn't really come in straight and then she quickly speeds up to pop over it. I wouldn't be jumping this horse 3'3" cross country. All that said, she does look like she would be a cute prospect.
4: She's cute. I would like to see someone on her though that knew how to bend her... to see if she actually knows how to bend and give to the bit.
5: Same as 4. I am kind of getting the impression that they wanted this horse to jump... and kind of forgot some basics in teaching.