I'd let her know what you're aware of and direct her to this thread if necessary. I'm sure she has no idea her auction is being talked about here and wouldn't have a problem letting you pull your offer quietly. It's not only about a bag and principle, but it's also illegal to lie in order to get out of a binding agreement and fees. I'm surprised she'd relist it so quickly knowing acegirl may see it.
Acegirl, you may not be interested, but if she knows her reputation is at stake, she may honor the original price and allow you to pay with paypal. It may be from pressure, but it would be the right thing to do. I'm surprised this behavior would come from a power seller with such great feedback. She could have easily put a reserve on it or pulled it early on stating a mistake in the listing if anything. Things like this just irk the you know what out of me.