Your head is worth more than your arms and legs, trust me. And that helmet looks dangerous. In a crash, that chin strap would tear right off, and yes, those metal pins would go right into your brain.
You don't have to spend $400 to get a decent helmet, either.
Don't know if you heard about the crash last weekend in Kzoo, but Lori was wearing an Ebay helmet too, I think it cost $20 or $30, but it was DOT rated. It probably saved her from a fractured skull or worse.
Like someone said, it's your funeral, but at least read this and think about it: