No, no, no! Do not buy a horse that has known behavioral problems when you are a beginner rider! Also a known leg injury? C'mon now...use your head and not your emotions here! IF a vet checks her out and ok's her for riding (after an x-ray) and she has a negative Coggins and IF you can afford a trainer and a riding instructor for a minimum of 3 months (for the horse...longer for you)...then maybe, just maybe you should buy her. But that is a HUGE maybe! It seems to me to be much smarter and safer (it is your LIFE we are talking about here) to save your money and buy a horse that is already well broke and trained and to invest in some riding lessons with a certified riding instructor. I have seen so many people buy horses that are problem horses to start with because they are cheap...when they themselves know very little (or nothing) about horses or horse ownership. I have also seen owners who know nothing buy a perfectly fine horse and ruin them through their own ignorance and, in some cases, abuse. I have seen people who have no idea how much it costs to maintain a horse buy one cheap then end up not taking care of it properly because they can't afford it (as in regular trimmings, worming every 8 weeks, yearly shots/Coggins test, etc. not to mention feed). Please, please...before you buy this horse do your research! Can you afford what it will take to make this horse a safe dependable ride for you? Can you afford to maintain a horse for the rest of it's life? Can you afford lessons for yourself to improve your riding skills for your own safety? Answer these questions honestly...then decide whether or not to buy this horse. I am not necessarily trying to discourage you...just to make you aware of the reality of this situation BEFORE you buy!
**Another option to think about would be to lease a horse and take lessons on it. That way if the horse does not work out, then you are not stuck having to sell a horse that didn't work for you.