I have been trying to make a few astral shards by putting things up on the Astral Shard Auction House, but so far have had no success whatsoever. I have tried a variety of things: low level weapons, high level weapons (including Epic weapons) augments, large ingredients from Shroud (including large devils scales), gear with really nice augment slots, undead soul gems. Not a bite. When I examine the items posted by others, almost none of them seem to have any bids, since the current bid looks very suspiciously like what the poster would have set for a starting bid. What exactly does sell? I would be far more willing to spend astral shards in game if there was a reliable way to obtain them, other than buying them with TP's.