I would also like to use this opportunity to say, please, please ask for feedback. Even if it is your dream dress, if the sale feels sketchy, don't go for it. Conducting sales via PM is also a tell tale scammer sign. It is simple to request that you would like the item, but would like her to make a sales post for it. Deleting sales posts is also another scammer sign. Please watch out for these things.
EDIT: i have checked her IP addresses from mid '09 and she was/is in Canada. She seems to be in Surrey. Lolitas there, i think you may have a scammer amongst you.
known paypal addresses/emails: