There is no way the 4" figures will be $20. That's an error. The price does not double in a year, while raw material and transportation fuel prices have cut in half during that same span.
While I have no interest in figures from the new SW movies, my son does, and his birthday is coming up next month. I paid $13 for the 4" black series figures, while I only paid $19 for a couple of the 6" black figures I wanted for custom parts. It was odd that 4" figures have gone up that much in a year, while the 6" figures have actually gotten cheaper.