I did 2 quests from 70-80, I only ran dungeons.

Since I dinged 80, I've done Storm Peaks, Icecrown, Zul'drak and Borean Tundra. Right now I am sitting on 60k gold with my epic flyings (had them since 70). I've made at least 35k of them with dailies and quests in those zones. I've dicenchanted every green/blue that I came by, so I could've made even more for vendoring that. I got 400 enchanting on 4 shamans and a bank tab filled with enchanting mats and alot of other stuff! You get alot of disenchating blues in instances!

I have to admit, that it was REALLY tough to stay in dungeons the last 3 levels .. very tempting to go and quest. The money that it would reward me, kept me going! I don't regret it I think you'll like it aswell, since you can always use gold on something fun!

EDIT:
Screenshot of the guild tab (have alot more Dream Shards than that)! I didn't even calculate all of the green/blues that dropped in instances, since I gave it all to my paladin friend, that we made Realm First! Enchanter!