That seems odd. Have you definitely completed the quest before trying to give him the artifact? If you havn't it may be registered as a quest item still?
yeah i have fully finished the quest and got the blessing from nocturnal. all thats left is getting thieves guild back to its former glory. and ive got every previous larceny target and it worked fine. i can still get jobs from him tho but thats it
Does your inventory allow you to drop the item? Because you could always just place the eye on the cabinet yourself, that's where it goes anyway. And when you sell it you don't get anywhere near what its value suggests, so don't be too disappointed
I believed its a bug because it happened to me too. I finished Blindsight and tried to sell it to him before and after attempting the final quest. Both times it didn't work. They eyes can be dropped from inventory though
Same, I am unable to turn in the Falmer's Eye. He has everything else turned in. According to my book it says you can turn all the Larceny items to Delvin.
I sold the left one but couldn't sell the right one.
Same here. Delvin bought the Left, but not the Right. I could only sell the Left after I went into my inventory and tried to store it in one of my chests. Thought this might be the case for the Right, but I could store it. I guess you should just hang on to them...