Oh ho, you want to play Oblivion as one of the chosen, eh Goy?
Trade and Commerce:
http://www.nexusmods.com/oblivion/mods/39255/?
Drop all the stuff you've swindled and stolen off to be sold, the rest is explained within.
And an unofficial update, though I haven't played it myself.
http://www.nexusmods.com/oblivion/mods/41948/?
A must Have is the bank of Cyrodill mod, where else can I store my hard earned shekels with interest?
http://www.nexusmods.com/oblivion/mods/3172/?
It also has some add-ons which are shady on the compatibility side I'm afraid.
Also, the main mod is integrated with the Better cities mod, so it's up in the air if these addons work with the integrated version also.
You should test it out goy, I'm sure nothing bad could happen.
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