She *looks* fine, from what I can see in the pics, but take a really close look at her. Ask to see her walked and trotted in hand, and also in a circle (lameness can often show up on a circle/tight turn even if it's not obvious when the horse is walking in a straight line).

She looks to be a nice horse, but (and im sure you know this already) good legs are one of the most important things to look for in a horse, because their legs are complicated, easy to get problems with but difficult to fix. If she has got bad legs, you'll have no end of troubles with her.

Tread carefully