Two Quick Skyrim Questions, Please!

Hey„ thank you for the help as always…!

First, about selling enchanted daggers. When I started making daggers with banish enchantment, I could get 1300 for each, easy. Then sometimes, with the same armor, equipment, and items, I get 600 or less. Any thoughts why?

Second, my awesome wife used to cook a fresh meal for me that gave me bonuses every day…then she stopped and the option is gone, suggestions?