I remember a mage friend in my guild got 2 of these at AH for for me and him. When we were in shadow labs and a lock asked us for water we said "Thats 20s each stack plz." He said "WTF y are you charging something that you can make?" We replied "Dont blame us, blame the fker that made the tome 100g each...wait that was you..."
And if I was the warlock I woulve just hearthed. Just cuz your too lazy to farm the drops yourself dont get mad because he did.