I used to post on a baseball card collecting message board (my other expensive hobby) but there are few reasons I've cut back:
1. It's mostly guys.
2. It's very nasty. These guys attack each other's opinions on a minute by minute basis.
3. They don't help each other, they bash each other. Some of them will lie and say a card is worthless because they don't want people to buy it.
I much prefer these boards. They're fun, informative, and heloful for much more than Disney stuff.