celebrity movie autographed cards

[tiger tiger]

Thinking of getting some autographed movie star cards. Just want to have an idea of what they're going for. Don't know if all of these exist. Or is ebay just the best indicator?

X-men:
Hugh Jackman
Patrick Stewart
Famke Janssen
Rebecca Romlijn (sp?)
Halle Barry
Cyclops (don't know the name of the actor)

Iceman
Kitty
any others I should consider?

Spiderman:
Toby Maguire
Kirsten Dunst
JJJ (whoever played him)
James Franco
William Dafoe
Topher Grace
Doc Ock
Gwen
Aunt May
Uncle Ben

Any help would be appreciated.