Ha. Well to clarify. I could have probably talked all about it to you. If you wanted to. As I've been following the .hack series since the 1st anime series.
My biggest interest was in what differentiates the vanilla from the GU games.
Mainly, because I saw a "trilogy" for sale @ ~$100 (sealed) and a "quadrilogy" for sale @ ~$120 (sealed).
Also, color me interested & feel free to post/PM me w/ info about the 2 sets of games