I have many items with type 'Not Marketable' , 'Not Tradable' and I can't do anything with them except remove. It would be good to have:
some system to change x items to new item with highs level of rarity (like CS GO contract system https://counterstrike.fandom.com/wiki/Trade_Up_Contract). Example: change 10 common items to 1 new uncommon, 10 uncommon to 1 rare …