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Realistic 1 - Just a few hints please.
Well, this isn't a spoiler, because it is posted under Real 1's description (johndoe/password): The password to johndoe is 'password' without the single quotes (').
After you log in, you need to find a certain directory, which will give you the AuthID for the admin. Go to toys.php, and inject the AuthID, then change the price. There you go!