Oops I confused myself. I meant to ask if there is no prospector, and just goblins and the sharpshooter. Can you use the sharpshooter as each one goes to the graveyard even though it is supposed to go at the same time.
Would this also work when you have goblin sharpshooter and say skirk prospector and other goblins? Can you sacrifice goblins to the prospector and use the sharpshooter each time before they all get wrathed away?