How much?

So I'm nearly sure I'll be selling space shoes, and possibly other painted shoes on Etsy in the very near future. I have ideas about pricing, but I was wondering what you guys think. Please comment and let me know ~

1. How much would you like to pay for shoes like this?

2. How much would you expect to pay for them? and

3. What is the highest amount you would pay?

(Please include which currency you are referring to. Australian or US dollars would be most convenient.)

Any feedback would be much appreciated. The quicker I work out pricing, the sooner I can start to sell :D