This blog entry is dedicated to Making Gold through raiding Karazhan.
In the beginning, I ran from the start of The first boss to Attumen the Huntsman himself, killing all the trash and, eventually, Attumen in one-minute-thirty-seconds flat.
In terms of loot, I had 6 Gold, 23 Silver from mobs and 26 Gold, 4 Silver from vendoring items. Since this was in 90 seconds, with some simple math: 60 minutes / 1.5 minutes = 40 minutes; 40*32.27 = 1,290g80s
We are able to find that the GPH (Gold Per Hour) rate is roughly 1,290g80s assuming that same rate of Gold stays the same throughout. It's also worth mentioning that Attumen the Huntsman has a 1% chance to drop the Fiery Warhorse's Reins, so go out there and farm Karazhan!
I hope this write-up has helped to add clarification; and, as always, good luck!