I recently installed the excellent OOO but i have found now that a lot of my items (jewelry and self-created enchanted weapons for example) now have no value when I am bartering with a trading npc. The items are valued fine in my personal inventory but have no value when the bartering inventory is open. If i offer these items to npcs they are made as gifts and I get no gold for them. Which is a shame!
Can anyone please advise me on what I can do to amend this situation? I'm in it for the coin.

Investigate Enhanced Economy. http://www.gamesas.com/topic/1285807-relz-enhanced-economy/
Most settings can be customised through it's ini file.

Cheers