Can't sell inventory

I am having problems with inventory taking up too much space that I can’t sell, melt or otherwise delete and make room for more stuff. Some items it lets me delete, but others just stay in my inventory and can not be sold. There is no “sell” option, only “equip”. The items that cannot be deleted in any way are: 

sparkling iron armor

kingly fortune ring

mighty master belt

silvered wind boots

shining pauldrons

kingly lava gauntlets

Any help with this would be great because I am sick of not having room in my inventory. My husband plays the game too but does not have this issue. 

 

Thank you! 

You have those items equipped in Wardrobe A B C, most likely B.

Unequip and you can sell them.