Its also possible with scrolls, I killed Arhu for the Resurrection scrolls but couldnt target him to resurrect . So i could not revive and kill him for endless resurrection rolls. The commander didnt drop anything after but the vendor dropped a totally new inventory again.
By the way Vendors are way too rich, why does a fishseller or a marketmen have 987 gold, its like they want to be robbed (or killed since i dont think pickpoket is implemented yet). Of course my righteous mage wouldnt, but the ranger likes shiny coins xD.