First you must have 2 aCcounts.. Or use 2 char Can use vending, bring 2 or more item it is weight is 1, then go to rOoM Pvp anywhere, ur firSt char must sell 2 item with same pRize, that item must 2,500,000z.. Then Ur you secoNd char buy first item just 1 ,and the secoNd item is -859, it will make ur the secoNd item cAn't make for sell again in same time... Click buy n you will get just first item, look at ur first char.. He will get a lot of money.. I try this in private server.. N go work..

1. U must have 2 character, first for vending, 2nd for buy.
2. Go to pvp roOm or underground or in map when you stuck (with fly wing).
3. First character must sell 2 item with same prize, its 2500000z.
4. Buy that item with your 2nd character, get 1st item just 1 (don't click buy first) then get 2nd item is -859, you will can't buy it for same time.
(note : u must have zeny more than 2500000z).. in some server, it will get crash.
5. If you click buy n just get the 1st item the cheat is going work.
6. I try this in private server wizz ro.
Just try it.. Note : server can't read more than 2 billion z.

i cant use that can you take a screenshot 1 by 1 step by step