At that price, I'd go check her out ASAP, assuming you're okay paying for upkeep until she's of riding age and can prove her prospect-worthiness! Her pasterns may be a bit long and her hindquarters look a tad weak, but that could all be the angle of the photo. Her face and color are stunning, and that always helps the overall picture in the ring. Seeing her move in person will tell you a lot more than one scruffy pasture picture, as you well know. Not at all familiar with the top lines, but the bottom is nice!
I bought my horse for a steal, based off some scruffy pasture pics taken at 20 months of age. 7 months later, I'm confident it was the best horse deal I've ever made. But it's been excruciating waiting on him to mature enough to start under saddle work, lol.