I've had a run with a party that I had to abbandon unfortunatly, but during this run I discovered something. The priestess in the shark city (whatever it is called) where you can buy/sell stuff gives you higher prices when you sell stuff then when you buy the exact same stuff! I always save some of the more expensive stuff for this priestesss since she gives the most money for it, but then I discovered she bought the stuff for the high price and sold it back to me, for a lower value! Made a fortune before I got tired of buying/selling!

Yeah I know that bug. Shame on you for abusing the trick! :D though I guess it is more innocent thatn steal/re-sell trick on thief vendors. :D

Intresting, very intresting...
Perhaps their fish-like brains make them forget the real price? :D

^And yet no fix or patch has made an attempt to fix it AFAIK. Or is it really the game design? Shark-people with fish-memory! Or they are just so grateful to PC and his crones due to Sekolath's prophecy? Hmm...

It's fixed, though don't recall if it's EoU or Baldurdash that does it.

What about official patch?

The official ToB patch doesn't fix it.

Baldurdash ToB Fixpack version 1.12 says:
Priestess Of Sekolah Store Prices Exploit Fix

File SHAPR1.STO; an edited version of the store file for the Sahuagin Priestess Of Sekolah found in the City of Caverns. It resolves an exploit whereby her buying price for items was far too high (appears to have been a typo of putting the decimal representation of the standard buying percentage in the the hexadecimal field) so if the gabber's reputation and Charisma were high enough, she would actually by items for less than she would then resell the same items for, so the same expensive item could be rebought and resold indefinitely for unlimited gold, limited only by the patience of the buyer.

Hmm I thought I had baldurdash fix pack, but the bug was never fixed. Strange...Maybe my version is old?