Gems are so lackluster and almost not worth specing in or even wasting the gold to buy. 176 to a secondary stat, even x2, is almost laughable compared to the secondary bonuses items give. No one sits around in trade asking for gem crafts. They need a buff.
Er. No one asks for them in trade because they are bought and sold on the AH, where they do sell decently. Although each buff is small, you’re adding 6-8 of them, so overall they are definitely worth having.
Players have a hard time seeing the forest for the trees.