If you were to craft a Showcase Showdown that involved pricing skills like everything else on the show, what would you do?
I wouldn't. It's a qualifying round and I don't believe everything HAS to involve pricing something.
The contestants who are spinning the wheel have ALREADY won something to be there. There is at least a certain amount of strategy involved despite the factor of luck: you still have to decide how close to a dollar is TOO close to avoid going over AND still beating those who spin after you.
In the half-hour days, the two top winners went to the showcase with no qualifying round at all, but that meant that all three contestants could have won their pricing games and the third-place winner was just "unlucky" enough to win less than the other two, which is something that's not entirely within their control, even if they're fantastic at pricing items. The Big Wheel at least gave all contestants the same chance to make it that far.