It's not a low scam chance.
What if you decide to just troll and buy/ sell at an extremely high/low market price? All the money, gone.
As i noted in my post... However fees will eat the majority of the money = not really worth it. You need more than $1500 to move the high/low apart from eachother enough for fees to not eat all profit. Can provide 0.5btc as collateral (so if i were to try buying high/low i would lose my escrow which is worth more than the money i would have scammed)