That still isn't enough to prove he isn't gonna take 50% of your bitcoins and run. The last thread selling 6990's ripped several people off. Not saying you're a scammer but the fact you refuse to use clearcoin and are a new poster are huge red flags.

Edit: I offered 140 btc (20 over original price) if he'd do it through clearcoin. He declined. Buyer Beware.