I think my most prized stuff would be my entire toy collection, but mostly the 10-year old 12" X-men action figures--I have Magneto, Apocalypse, Weapon X, and Rogue. I also have several Venom figures that I haul around with me when I run errands--just 'cuz I'm bust doesn't mean I can't be happy, right?--as well as an unopened talking Venom action figure made 12 years ago, unopened Pokemon figures, my Voltron, Transformers, and original Ninja Turtles toys, and the rest...
In the comic dept, I have a pretty boss Transformer and GI Joe collection, lots of great Spidey and X-men stuff from the early 90's, including the age of Apocalyse stuff when they split X-Men into all those other titles, and a pretty great collection of Venom stuff as well.
I've never taken pics of my toys, but I guess it could be kinda fun. Like that guys on totallygraphic--the one that makes those hilarious GI joe stories--have any of you guys seen his stuff? I f*cking love that guy.