so I started farming a boss and the it told me I have to many items so i went to my backpack and I found out there is no quick sell option. does anyone know why? thnx for the help
Locked items and Crown items cannot use quick sell. You have to highlight an item that is able to use quick sell, so sometimes you have to look through to find one to get it open. I find skipping to housing items seeds almost always has something that will let me open quick sell, then I can flip through all the categories and pick what I want to dump.
I don't know why they never put that button in the gear section of your backpack, but go to the section with all of your housing items (keyboard short U) and click on any of the tabs other than "castles," it should be along the bottom. From there you can sell anything, including your non-housing items.