second hand set?

[?anonymous?]

i was trying to do pvp , and i was going to buy a demonic set for it , im l61 , i thought a demo wand set wud look coolio . so i asked this guy to sell to me , we were negotiating and stuff and he said that a guy named jhood used to own it before and that he is a legend .
so if a guy named jhood used to own it and then he owned it then its second hand

AND if i buy it , it will be third hand, PLS NO HATE , THIS MIGHT BE A STUPID QUESTION BUT I WANT TO CLARIFY
does the power of a set go down if it has been used by many ppl and is old? if so , where can i get freshly made sets
pls no hate , idk much about this game