Are you planning to sell your digital products? WordPress Download Manager provides you all the options you will ever need:

1. You can sell a package at specified price
2. You can apply different price for different level of license when you enable product licensing option
3. When Package has multiple files, you can enable file pricing to allow users to purchase selected files rather than full package ( like purchasing a few songs from a full album )
4. You also can apply license level pricing for individual files