Why not letting the user set up a Price List for purchases using Item Discount Group in the same way we can do in Sales?
Most vendors offer discounts based on item groups and, currently, BC does not support this common fact.
Our customers need to create a Price List with every single item, which is not really a problem, but a nightmare if you are frecuently adding new products to your item list and need to make sure they are included in the corresponding list price.

I have checked the code and I see it is not posible even try to extend the Price Asset Interface.