And no offense Beaker, but I think your definition of a "true" Muppet fan is wholly incorrect. For one, some Muppet fans, such as myself, cannot afford to buy every bit of Muppet merchandise, especially considering how expensive it can be. The Palisades toys have shot up in price on sites such as eBay, and as much as I'd love to get the Palisades Scooter bust, I'm currently unemployed and don't have the cash.
I'm pretty much in the same boat. The idea of buying the Palisades toys and all the plushies and replicas and every shirt I can find would be amazing; however, college has left me broke with barely enough money each month to buy groceries. Maybe someday I can afford all the Muppet merchandise I want... but yeah, I don't think you have to frequently spend money in order to be called a true fan. I think it's the amount of love you have for the characters, the amount of respect you have for the Muppeteers, the amount of knowledge you are willing to take in, and just that feeling where you
need to watch everything Jim Henson/the Muppets have ever touched. That's been the case for me, at least.
And there's so many other ways to prove that you are a true Muppet fanatic! Writing fanfiction, long/deep discussions about the character, overall excitement whenever they're brought up in passing conversations, thinking about them constantly, still getting that warm-fuzzy feeling while watching a Muppet movie even though you've already seen it a gazillion times, and so on. I went and wrote up a six minute slam poem about Muppets, and I think that was a great way to display that I'm a true Muppet fan. So, yes, I don't think money has to necessarily factor into the equation.