What price fandom?

The actor who played Mr Chekov in the original series of Star Trek will be in Sydney later this month for a fan convention. I am a Star Trek fan, although more inclined to "The Next Generation", and I have sometimes toyed with the idea of attending a convention - like a real Trekkie. I'm not sure I want to spend $100 for the experience though - so I'll go to their site to have a look and see if I can convince myself!