No wonder 313 cought Donalds' eye - she's the only thing that falls into one's eye, then you look over the trading post. I'm suprised, that who ever sold her, only wanted a burro - yeah okay, she's not that reliable (sure, heh), but if I'd sell her (IF I even wanted to do that) I'd sell her for much more than a burro.
But as I said, I'd probably keep her myself and give my best to keep her fit and running.