A new view is added to the VirtueMart interface giving a single screen with all of the products and all of their price configurations. You can go down the list setting each price, then just click save at the end.

Or you can change all of the currencies to an alternative currency in one step. You can initiate a sale by switching all products to use the override price (and switch them all back again at the end of the sale). You can change the quantity ranges and the date ranges that each price is valid.

You can also restrict the list that you are applying your changes to to a particular category, manufacturer, or shopper group.