Hey everyone.
I have found that the Normal 5 man Wrath instances are quite easy to solo with my DPS spec'd Warrior.
In 5 man Dungeons, there are chances of the following drops:
Cloth - Great for selling on AH/Trade Channel.
BoE Blues - In Normal 5 mans there are plenty of BoE Blue drops that are specific to the instance eg. Palladium Ring in HoS Palladium Ring - Item - World of Warcraft
BoE Greens for DE/Selling/Vendoring.
Boss drops to vendor.
And much more!
I have also done a little Soloing of Heroic Trash in Pit of Saron for the chance of a Battered Hilt. Got to be careful here though. The casters with the Non elite adds should be killed 1st, then the Bone Giants, then the 4 packs of elites. The Dragon riders are quite tough so I usually only kill the mobs around the entry semi-circle area then reset.
Probably the best thing about soloing these is the fact that most players have ran though them with groups a number of times and know the shortcuts/NPC abilities etc.
Escape the daily grind of gathering/auctioning and try a change of scenery!