I usually do this, I make a couple of basic packs to start, then I set the price depending on the amount of content this actress has.
If we take another game and not this one, then I try to make a basic set for girls that will contain content for each role in the game (spa, glory hole, etc.).
Everything else is also looking at the amount of content, sometimes at the quality of this content, for example, if an actress has a lot of videos for a club theme, she will be more expensive than anyone.
In short, if you wish, you can complicate your own life, because these parameters can be easily changed in the file.