It doesn’t seem like it would be a great limited supply item for you to sell on the AH for your WoW gold farming adventures, but actually it is a great seller.  I think the reason why it sells so well is because it is only sold in one place.  Most of the other limited supply items are sold by quite a few vendors which makes these item not quite as profitable.

The Pattern Earthen Leather Shoulders is a great item to buy and sell to earn some cash by WoW gold farming.  Like I said before this is a very understated item, but the beauty of it is that it can be purchased for a mere 20 silver and then sold on the AH for an average of 2 gold 74 silver.  I have even seen this item go for as high as 6 gold.

Where to find the pattern

• Hillsbrad Foothills - Zixil 60.19

(while you are there pick up Pattern: Earthen Leather Shoulders, Pattern: Red Woolen Bag and Formula: Enchant Boots Minor Agility)

Just a note that the coordinates are approximate as this vendor travels the road between Tauren Mill and Southshore.  Start of your WoW gold farming right by heading to Zixil and picking up this pattern.