Great collection! I love the Kiki cel especially!
I used to work as a librarian at the University of Virginia, in the rare books department. The building I worked in was an older building with a newer addition, and the connection between the two was a long boring hallway that somebody before my time decided to decorate with animation cels from a collection that had been donated to the library in the 1950's. They were Disney cels, mostly from Fantasia and Snow White, including three -- THREE -- of Snow and all seven dwarves. They had no idea what was hanging on their walls. I happened to mention to my department head one afternoon that I was surprised to see something so valuable just hanging on the walls, and he was stunned. At least one of the Snow White cels was later appraised at $10,000 -- and this was in 1985. Those suckers came down off the walls and into a vault faster than you could say, "Walt Disney is cryogenically frozen."
Sorry for the sidetrack, but this thread made me think of those times.