So with the release of Item Options System I had created a demo NPC with a small number of options to test the system out or be used as a full fledged NPC.
Configuration
/**
* General Configuration
*/
/* Chance of the enhancement process to fail. (0 - 99 in percent) */
.chance_of_failure = 10;
/* Delete the item on failure? (true/false) */
.delete_on_failure = true;
/* Required amount of zeny for a try. */
.zeny_requirement = 100;
/* Minimum amount of the bonus value.
* For