Ive beeon doing this for some time now.
Just buying [Formula: Large Prismatic Shard] from Madame Ruby in shattrat and sending them to my bank-alt. Then I list them on AH for about 20g and they are sold for 6g = 14g profit.
Sometimes there are others who try to sell the pattern and then i just underbidd them.
If you do this with all the other things you should be doing when getting money off selling it will add up to your goldcollection!