It's a huge risk ..
You've been trying to sell it at 70k for a while and i've noticed that no one has bought it, and i'm not too sure of the price for a skull necklace.
So I might have to pass, sorry.
Err, I'm not stupid.
Someone has obviously bought out all of the plasma forces (or there was like one on there), you were obviously gullible enough to believe it was worth allot and decided to buy one for huge profit.
Search the price of any other plasma item in the market, and it will be below I bet it will be below 10k