Look through the last few pages of topics. One of the topics is called "Ring of Invulnerability," and about halfway down someone (I forgot who) gave a link to Arundor's Abode, where you can download all sorts of hacked stuff, from basics like Elven Chainmail (which really SHOULD be in the game, because without it, Bards have to be buck naked if they want to cast spells) to the Ring of the Mind, which essentially makes enemies--ALL enemies--ignore your presence, even while you're chopping off their limbs. (Subtle hint: That last item will unbalance the game a little bit.) There are also downloadable characters and AI scripts.....I like the idea behind the "Gorion Wins" script.
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Boots of Stealth: 1125 gp
Shadow Armor: 7875 gp
Slipping an Oil of Firey Burning down the back of Sarevok's armor: Priceless