At the moment I have a great big poster depicting all the band members from what I believe is the Eagle has Landed era on the wall (framed too!), a nice blue metal pin badge from wheels era, a sew on badge from the wheels tour, the interview picture disc (why on earth did they interview Paul bloody Johnson?? and no one else?) and the Strong arm tour programme but my most prized posession was a silk scarf from the first album tour, different print on both sides in great condition, got bloody nicked though.
I also used to own the huge poster of the gig at the Rainbow years ago, but that got ripped up by one of my lunatic ex's while I was out....the bitch.
By the way, if anyone wants a photo of these items, let me know and ill take one and e-mail it you. The posters rather nice.