Sid Cahuenga's One-of-a-Kind is our all time fave! We go in here every visit hoping to come across a unique poster to add to our collection. We are still on the look out for a BLACK CAULDRON (sp?) poster.
But last year was our jewel find!!! We had been in 2003 and came across a Haunted Manision ride poster. We never went back to pick it up. As soon as we entered through the gates last Sept, we went straight into the shop searching for the poster. We searched the entire store and finally DH asked the CM (who had been helping another customer) about it. Our hearts were already in our stomachs, but the gentleman went into the back for a few mins. I believe he had told DH they had discontinued that specific poster (the one with the hitch-hiking ghosts). I had gone out to look through the posters on the front porch, when DH walks up to me with a HUGE grin on his face

The CM had emerged with the "sample" they used. It was a little worn (I mean, VERY hard to see a crease in the bottom corner), but DH was willing to buy it no matter what! Well, the CM told DH it was his for free! *GASP* WHAT, something at Disney was FREE?!?!

We were both so excited!!!! He even kept it in the plastic for us, and it is already tacked (mounted) on sturdy board. We have it hanging in the hallway now!
SO yeah, Sid Cahuenga's One-of-a-Kind is definitely our fave store at MGM.
Also, Mombasa Marketplace/Ziwani Traders is my fave @ AK. I love Okapis (the animals you first see on the right during the safari) and it is hard to find items related to them. During our first trip to AK, I was able to purchas my 2nd Okapi plush animal. Her name is Nyala Betty!

Yeah, I am a geek
