As a new member, and collector, I figured I would share the three Star Wars posters I've acquired so far.
1) No-Date Revenge of the Jedi Folded
2) Empire Strikes Back Style A 30x40 Rolled
3) Star Wars Style D 1-Sheet Rolled
These were actually the first three movie posters I ever purchased, in that order. I think I got a pretty good deal on the latter two especially, since they both seem fairly rare. I've only seen one other rolled Style D in auction histories I've looked at, and it was in only 'good' condition, where all three of mine are C8-C9. I actually picked up all three from the last cinemasterpieces ebay auction.
I'm working on trying to get a complete (as possible) collection of US posters from the original trilogy. Though it will probably be a while before I can afford a few of the more rare/expensive ones.