PriceShift: Bulk Price Editor

PriceShift changes the price and compare-at price of many products at once, now or at a set time, and puts them back when the sale ends. Before the first change it saves each variant's original price, and the revert restores that saved price instead of recalculating it. Prices you edit by hand during a sale are kept, not overwritten. Every run is checked after it finishes, so you see how many prices changed and why any failed. You preview every change before it runs.