You didn't play this game for 4 years, it was released on December 22(I believe) 2010.
So in another way, you've only AFK for 2 years straight and played for 1/3 years(4 years isn't even close yet).
Duplicating is worse than being scammed. I've remembered a few people who used the duplication hack/glitch on their 'super' items. I won't name them because I feel that they've learnt their lessons long ago.