thats the exact same thing that happened with the damage bug, resell and rebuy weapon from the npcQuote:
it is true.
i saw the bug with my own eyes.
get a dress item where you can add blues
add the enchanetment luck +1% thingy.
the bug was this: if you unequip it, sell it to the npc, re-buy it from the npc, and re-equip it, you had doubled values.
do that about 100 times, and you'll have a 100%success rate wearing that dress.
but it's fixed already.
the thing oriya did was duping +ed items. if they fail he sells them to the npc and dupes the succeeded one again.
that's how oriya did it (i guess)
its the same bug for stacking any values via reselling