She's currently in stock at PS for $120. So if she has been removed from her box but is still in excellent condition with complete stock, she will be worth approximately $90-100. If she goes out of stock again, then she will be worth more, obviously -- whatever the secondhand market is willing to pay for her.
ETA: Ha! Pixachii beat me to it by one minute.
ETA: Ha! Pixachii beat me to it by one minute.