Furret

tries to sell you a gem of true seeing for 1000 gold. you have the option to buy or walk away.

*spoiler*

he was trying to cheat you! if you buy the gem, it turns out, it's just a plain turquoise gem with no purpose but to sell at the store for gold. killing him gives 7 xp. very easy to kill. carrying a turquoise gem(or presumably 1000 gold), plain dagger, plain leather armor and 1 gold piece. no alignment penalty for killing.