Thanks for confirming you are a scammer. lol check his "untrusted" feedback
20 BTC transaction done as a new guy, with his sock puppet account...
His trust rather shows 2 positive feedback. I believe the other guy just randomly put in the 20 BTC value in the risked btc field. However, its not right to brand him a scammer just because of that. You can always use an escrow, making it safe for the buyer and the seller.