I TOTALLY agree with this. I would go so far as to lend her the money and set up a strict payment plan to teach her about the actual labour cost of buying things, IF you found the perfect bag and thought you might not happen on a good deal like that again.Here is my own experience: I grew up in a household where expensive things weren't handed to me. That doesn't mean that the parents didn't try to give me nice things, but I thought that they were age appropriate. I learned the value of money (which people cannot understand at a young age) and now I am able to buy nice items with my own money. I credit my success as an adult to the financial lessons imparted on me as a kid. I'm glad I wasn't given expensive things because now I appreciate being able to purchase things myself due to hard work.
I understand that you're trying to share your b-bag love, which is fine...but she'll be bored of it sooner than you think since she didn't have to spend months and months working for it, deciding if she really wants it.
I say absolutely no unless she pays for it herself.