Jedi Academy Training Manual, Star Wars: Saga Edition
Picked it up at my FLGS, finding out they were all going OOP added some urgency to complete my collection.
The Force Unleashed Campaign Guide, Star Wars Saga Edition
Also picked it up at my FLGS, all going OOP. . .(see above)
Lots and lots of Star Wars minis.
When they announced ending the Star Wars RPG line at WotC, I knew the mini prices would skyrocket if they were all "out of print", so I completed the set of ones I would use in games (not complete collectors sets, but making sure I had enough of ones I would use, appropriate aliens, jedi, troops, droids ect.). Some orders from eBay and a couple of dealers online and I now have a nice well rounded collection of starships and characters for various eras and styles.
On Hallowed Ground, Planescape, AD&D 2e.
An old classic I liked. I never had a copy myself, only read a friends copy. Found one for sale at a used bookstore and my wife got it for me.