I decided to sell the Tall Tophat I received from the Black Friday event for being the first in line before the opening.
viewtopic.php?f=2&t=11620&start=30

The difficulty should not be taken into consideration, because:
JohnCarver wrote:*Items with 25 Difficulty will have an in-game way to 're-roll' their difficulty again. This is more or less a warning for anybody who is selling Mystery stuff at low prices due to the default difficulty. Just a general heads up that it will be 'fix'd' next patch.
I accept silvers/lizebth doll/golden goose/store items.
Only serious offers.