Our featured eBay item this week is an item from my collection: an ¡UNO! poster signed by the whole band. I think this poster originally came out of a magazine, but it's pretty large (about 24" x 16"). The signatures look great, and I'm positive that they're authentic. Signed trilogy stuff can be hard to come across, due to the relative lack of promotional appearances and things like that compared to other tours/albums.
I've been selling some items like this in a thread on our forum, GDC. Check it out if you're registered there, and contact me for info!