Spoiler
I'm playing on 360 and have sold the Elder Scrolls Blood and Sun to the Moth priest
When I went back to the college to turn in a book I found in the Forgotten Vale I also tried initiating dialogue to sell the Dragon scroll back to Urag Gro Shab but I couldn't get it to come up. I can't put it down so it's quest locked and therefore not weighing me down. Is there some point after radiant quests etc where I can turn it in? I would at LEAST like to store it in the chest in the Arch Mage's quarters even if I can't sell it as it seems more at home there.