open your stylist.txt
change the npc script line header:
prontera,186,210,3 script Stylist 122,{
to this:
function script stylist {
then add this to your desired item:
callfunc "stylist";
501,Red_Potion,Red Potion,0,50,,70,,,,,0xFFFFFFFF,7,2,,,,,,{ callfunc "stylist"; },{},{}