In the first game, you could sell any item that wasn't equipped, including mastered items.
Which made a lot of sense, as you'd use an item until you mastered it, earning a skill point, and then sell it and apply the money to a better weapon.
In the new game, I don't seem to have the option to sell a mastered item. That seems like a strange strategic change - it means when an item is near mastery, you need to decide if you want to keep it till mastered for a point, or sell it for gold. Is that really the case? It would seem to create annoying dilemmas. If you wind up with an incredibly valuable item, like the infinity blade, it's basically crazy not to sell it right before it's mastered. If you master it, you trade a huge money opportunity for one point. But in the old game, I could keep it for its abilities, and use it, knowing I could sell it later if I want to.
Am I missing something?
UPDATE: This may be a more specific version of this question, but I'm not sure.