The Talking Mud Crab
You can find this talking mud crab northeast of Bal Fell. He resides on a island directly across from the entrance to the Releth Ancestral Tomb. You can sell all your high priced weapons and liqueur here and get top dollar for it.
Each single day he has 10,000 dollars and so to sell more than one weapon worth thousands I sleep a full 24 hours and then just keep selling until I am done.
If you have a weapon that is worth 11,000 dollars and want to get that money for it even though he only has 10,000 dollars you need to buy 1,000 dollars worth of stuff from him and then sell the item. Next sleep 24 hours and then resell back to him what you bought from him. You can simply figure a system and then go from there. I have sold items as high as 75,000 dollars or more.
Weapons and Armor
These weapons and armor are some of the best in the game when you are first starting out. If you can get a hold of some of these then you can rock it out in the first levels.
Azura's Servant
Daedric Shield that can be found in Tel Vos' northeast tower. It belongs to Televanni Councilor Aryon.
Daedric Dai-katana
This is the seventh most valuable weapon in the game. You can get one from the remains of a dead warrior in the Maesa-Shammus Egg Mine. You can find this mine north of the Molag Mar Temple. Leave the temple and take the first right. Keep following the water until you see a path leading to the left, take this path. Take the next right and then keep walking this path until you reach Mount Assarnibibi, it is near here.
Fury
This unique enchanted claymore is on a dead warrior in the Hall of Maki in the stronghold Kogoruhn. Kogoruhn is found Northeast of Maar Gan .
Sword of White Woe
This can be found in Suran's Guard Tower and the Eastern Guard Tower in Balmora. You have to be very careful when stealing this sword if you want to get it and not get caught.
I would have to say the best thing I found was the talking Mud Crab. To get to him from Balmora I always took a silt strider and then just went east of him when I got off. He makes it much easier to get the things you need so you don't die so much when you are trying to level up. I also got really good at stealing things too.