I don't buy that explanation...seen it before.
Tell her you want to see a pic of the blade, and if she doesn't produce one, tell her you will give very bad feedback on her page...bad feedback is something sellers avoid like the plague.
Methinks she's done some searching and found she could have got a lot more...see the pic with the damage, or bad feedback...don't agree to cancel the transaction until you do.
Adding: she has 100% feedback, she seems to be a big seller, so bad feedback is something she doesn't want. Ask for the pic and don't cancel the transaction until you do. If it's damaged, then fine...what a loss!!