During the gearing process, you have to run through the Deadmines alot. Considering a few pieces of gear drop inside.
The popular twink armor Blackened Defias Armor.
There are two weapons you may use, the sword Cruel Barb.
Or if you are a fan of the fun play of daggers, Buzzer Blade is available.
I ran through multiple times to grab these, which only made me miss how fun of an instance it is. I currently reside on the Horde side of things, but Deadmines made me miss 'ol Alliance play.I believe that Alliance have far better starting instances such as Deadmines, The Stormwind Stockades, and Gnomergan.
First of all, the Stockades is a prime area to farm wool, which is a rare commodity when Horde. Wool stacks can be up to 15g at times on my server, rather frustrating when trying to powerlevel your Tailoring or First Aid. Deadmines is a sufficient wool farming area but it still drops plenty of linen and sorts.
Deadmines, well its just a rad in
stance. Big buzzsaw machine, huge smelting plant, Mr. Smite, Pirate ship? :( 
All this makes me want to re-roll
Sorry for the QQ :)
Enjoy