this earring is great for skilling up Guard. This, coupled with some Evasion- and Counter+ gear, is a good way to level Guard, while the Counter+ keeps you alive a bit longer.
I won the lot on a Solemn Vision drop off of the Promyvion-Mea ENM (though it seems you can get any vision from any promy ENM). Traded it to Vanessa in Ru'lude Gardens and got this. Sells for 60-70K on Carbuncle as of 5/28/05