WTBMinecraft dupe method (50-100$)

Hi , I wanna buy a minecraft duplication method , I have 50-100$.

PLEASE: Not a know method (private? tell me)
Works on a lot/all (faction) servers
Refounded if the method is patched?

NOTE : it can be difficult/hard (I prefer simple lol)
It can be a IG method , game/server exploit ect... its not a problem.

CONTACT: compte.brain (Skype)

THANKS