This is a repost from my own post, but I recently started on a new server and this took away all my money problems so I'd like to share it again with those that don't know this yet:
The "pattern: wicked leather gauntlets" is sold for horde players by Werg Thickblade in Tirisfal Glades (the Bullwark) for 1 gold and 8 silver. On my server this sells for about 20 gold on the AH because it is a good item to level your leatherworking (it is in some leatherworking guides). The good thing is that this recipe can be acquired by low level horde players so you can start making money on a low level already. Or do as I do, park an alt there and check every now and then if he is selling it.
Alliance players can get the recipe from Leonard Porter at Chillwind Camp in Western PLaguelands so it is not easy to get at a really low level, but it will still sell well on AH.