Mmmm, I would try to haggle with her. Offer her 75 and go from there. It's not a shoulder bag is it? How long is the strap drop I wonder? Are you only able to hand carry? Sometimes that's a hard sell. Even though it was 400 dollars and is mint, it's a pain if you can't shoulder it, don't you think? Get the strap drop measurement. That would be from the top of the strap extended, to the top of the center of the bag.
Ack, I didn't get this till after I texted her 😦. I was able to bring it down to $100. She says they fit over her shoulder. When I look at the bag tomorrow I'll see if its true 👍