---Please note that server economies vary, so my apologies if these prices are not consistent with yours ----
I run Black Rock Depths mainly for Large Brilliant Shards however, if your lucky you can get Goblin Jumper Cables: XL and Enchant Formula: Fiery Weapon.
Before I get into the guide here is a brief synopsis of what I get/hope to get on a typical run.
12+ Large Brilliant Shards (sell for 15-20g each on my server)
1 Goblin Jumper Cable: XL pattern (not guaranteed) (50g each)
1 Enchant Formula: Fiery Weapon (not guaranteed) (100-150g)
So looking at a minimum. If worse come to worse I get about 12shards only and sell them for a min of 15g, boohoo. However, this rarely the case. I have gotten pretty good at running this instance and can actually get about 2 complete runs in less than 1 hour. So i put the 200-500g for an average.
Hunter would be the ideal class for this, however, I am sure other classes can work just as well, just might be a little slower
------ I farmed BRD for 55mins, and actually finished 2 runsm, yesterday May 17th ---- which netted 26 Large Prismatics, 1 fiery enchant formula and 2 goblin jumper cables xL -------- I have already banked 500g and have about 6 more shards in the AH -------
Above is the general path I follow:
1) Bael’Gar [#11]
2) Unlock Forge Gate [#12]
3) General Angerforge[#13]
4) Golem Lord ArgelMach [#14]
5) The Grim Guzzler [#15]: Talk to Plugger Spazzring [buy 6 dark iron ale], turn around and talk to guy right behind him, give him 6 ale. He will open door for you, Now Phalanx [a golem] will be blocking the door, [8th boss] fight him for the shard
6) Ambassador Flamelash [#16]
7) Panzor the Invisible [rare spawn]
Summoner’s Tomb [#17]
9) Go back to Grim Guzzler and Check with Plugger Spazzring he might have the limited item Pattern: Black Dragonscale Breastplate [which is a nice item you can sell for some decent Gold] (it takes about 30 mins or of being in the instance before its spawns [i usually never see it because it does not take me that long to reach that point anymore, after i check for pattern Kill Plugger Spazzring he can drop Goblin Jumper Cables: XL
10) Lord Incendius [#10]
11) Warder Stilgiss & Verek [has the potential to drop 0-2 shards, with a minimum drop of at least 1 small brilliant) [#8, I believe this may also be called the Coffer Room]
12) Lord Roccor (drops small brilliant, however, I farm this for Enchant Weapon: Fiery Enchant
13) Rinse and Repeat
---Disclaimer---
I am new here, so if someone posted a guide like this already, my apologies.