I'll answer some of your questions:
1) It cost me $450, and another $100 for shipping.
2) It is strictly limited edition. Mine is #387 out of #500!
3) Yoshi is not permanently attached to the base and is removable (as are his hands). However, this was clearly intended for packaging purposes and he simply cannot stand on his own!
I thought the pics would be automatically resized, so I'm sorry about the GIGANTIC 2mb images! :S They're easier to view if you open in a new tab.