We really need an easier way to compare our prices

There are huge discrepancies between game prices. I've see some games, in the same condition, have a $20 difference in price. And, unfortunately, there is no easy way for sellers to adjust for this. I would normally adjust my prices on a daily basis to be one of the lowest available on the Marketplace. Last week when I adjusted my prices, it took me hours to do so (I have many items). A week later many of my prices are no longer competitive, but I just don't have the time to go through each and every item on my list, see what others are charging, and adjust my items accordingly. We need a more streamlined way to manage our inventory. This is resulting in lost sales.