My prefix has a value when defined
My infix has value when it's refined
My suffix is not usually moved
My whole is after something's been removed
What am I?
If you steal my infix, you may end up at my suffix.
Same answer but not necessarily the same prefix/suffix/infix:
My prefix does not play but is part of the game
My suffix is a place for passengers of a train
My infix is shouted as warning of danger overhead
My whole can make a specific type of bed