Patch 5.4 adds a brand new Engineering mount that has never made it live. This mount is called Sky Golem and it allows you to pick herbs while mounted. If you want to know what materials you'll need to craft it, view them by clicking here. The mount is obviously Bind on Equip, so you're going to be able to sell it via Ah and/or trade. Engineers, TAKE MY MONEY!
To have a better understaning of the mount's animations, here is a video: