I'm going through my inventory here and it's like finding a needle in a haystack.
Separating items by category is excellent, but once you're scrolling through the category, trying to find anything is difficult to say the least.
If the major categories auto sorted by their sub category finding what we want to list in the market, check if we have multiple copies of the weapon, hair style, or cyberlimb, and building loadouts would be much easier.
Inventory management is going to be really important if the marketplace is going to take off. Sorting options are vital to make that easy on the player end.