Starbuck's City Cups

On the trip I took to Vegas earlier this month, I bought a Las Vegas Starbucks City Cup at the airport. Thinking to myself - wow this would be fun to start a collection of all the places I have been!
So when I got home, I looked online to buy the other ones I would need to complete my collection, but you can't!! Come to find out -- they are highly collectible and the designs change every so often on them. From what I can see, they started doing these cups around 1994.

Here are the cups I would need so far to complete my collection: