Here's my opinion; While her feet appear longer than I would like, I don't think that is necessarily a reason to feel that you made a bad decision on buying her...I wouldn't be so quick to decide OMG I have to sell this horse it's terrible! Find a farrier who will start the process of rebalancing her feet. Also if she's totally sound, why on earth would you jump to the conclusion that she is so messed up you need to sell her? All horses have their flaws, but that doesn't mean they won't be useful for many many years to come.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."