You can create a new price list from the existing price list using a clone option.
To clone a price list
Go to ADMIN SETUP > Pricing Administration > Price Lists. The Price Lists page with all price lists is displayed.
Search for the price list you want to clone.
Click the ellipsis icon next to the product name and click Clone. The Clone Price List pop-up is displayed.
By default, the Price List Name will beClone-The price list name from which you have cloned and all the field values will be similar to the cloned price list.