go with the primary, but you should always do your reasearch on other sites.
about jennifer garner: like i posted before, she only sends out preprints. so, to save your $$, you can just write her an e-mail at
Jennifergarner@studiofanmail.com. studio fan mail will send you free preprints anywhere in the world. the only way to recieve an authentic autograph from her is in person.