Get her to believe you have a friend or a cousin who lives in the next town who can meet her somewhere to pick up the handbag or even come at her house.
Include her address in the message because you want to confirm it for when when they pick it up.
The next day ask her if it would be easier for her, you can send her a box in the mail with the return postage on it for the return.
My guess is she will return the hand bag right away.
I had to resort to this about 2 months ago. I had been selling items to this guy for about six months. So then one day the guy wants a refund.
Without getting into all the specifics, after I refunded it, he said(blatantly) he was going to keep the item for his troubles. 
I basically told him the only reason I trusted him was because I had family in his area, my cousin will be there to pick it up, how it's a small world, yada, yada, yada..  I then googled his info and found out his phone number.  I called him at 7:00 the next morning. Spoke for a minute, he sounded very surprised and told me he would send it back to me right away.
I did all that without threatening him or raising my voice.
I guess surprise is the best element of an attack.
 | 
