Teefury

I've been using teefury for awhile, but haven't bought anything. Been waiting for the right one. And literally the one day I can't check, the shirt of my dreams passes me by! (Best Buddies by Chris Wahl) I'd like to get two for my dad and myself, since we're huge fans of both Star Wars and Calvin & Hobbes. I'm going to take my chances with the grab bag, but is there any chance of popular tees going back up on sale? Or is there a way to order them through the site, possibly for more than the $9 base price?
Any help is much appreciated.

Thanks,
Strobe.