Unique gift websites?

I’m really sorry about this, because I know this question has been asked in another form before, but I’ve tried the search option, and nothing has come up. Maybe if you could post a link to the previous thread so you don’t have to re-answer the question? I’m looking for some interesting birthday gifts for two of my friends. One is in love with John Mayer, and the other likes Batman and James Bond. Thank you for the help! :)