I how wondering where I can get the full value for the expensive items I find like for 16k that sword found in Balmora please help?

http://www.uesp.net/wiki/Morrowind:Creeper or http://www.uesp.net/wiki/Morrowind:Mudcrab_Merchant have lots of gold, and buy items at full price.

Many of the Merchants in the city of Mournhold (part of the Tribunal expansion) have more gold than most of the Merchants on Vvardenfell, but Creeper or Mudbcrab are still your best bet.

Thanks