What kind of stuff is really valuable to you? Is it a signed album or a poster? A live recording? Which thing do you really don't want to miss?
I have a copy of U2-3, Aflexy disc of Wire Dub Version which was free with NME and a set list from MSG Show 10-10-05 from Adam
Pair of Larry's sticks used at the May 16th, 1997 Clemson show and a couple of Edge picks, used at the October 31st, 1997 Detroit show and the May 13th, 2001 Chicago show. Alot of other stuff also. But those would be the three biggest for me.