Just started leveling my Op and have a full 20 Gallowtech set that i've had him in since the closed beta.
All Level 20:
Gallowtech Wings (I recall these being quest item so i really wouldn't feel comfertable selling them unless the buyer knew that)
Goo Soaked Sleeves (The better alternative to the Gallowtech Sleeves, the Op version of the Ihelmet and Battlemarked Chestplate)
I haven't seen any 20's in the cs for a long time so i was wondering if 20's are discontinued or something and how much they are worth. Fair prices por favor.
EDIT: I also have a pair of Mine Sweepers if anyone's interested.