Ordinarily a player can't buy from an enemy faction's shop (if neutral) because they can't enter the faction's ZOC. However, if the ZOC expands the game gives the option to buy from their shop. Note: disregard the unique items in this shop, playtesting a mod atm. Regardless I know this loophole exists in all versions of the game.
Save - http://dl.dropbox.com/u/19969679/Elemental/119m/UDFv0.1d/119m_UDFv01d_53_Kraxisshop.zip
Note Kenata is in Kraxis ZOC (due to expansion of ZOC):
Note able to buy from Kraxis shop:
