This guy tried to sell me a KNC titan via PM, I felt suspicious so did not respond, he then posts a sale for his antminer S7 which was his 'one and only' miner, which it wouldn't be if he had the KNC titan also. I would proceed with caution with any transaction, use escrow and only deal with your escrow provider (ognasty, psychoticboy, etc) directly, not via a forwarded message from said account or other, which sometimes will direct to a fake bitcointalk version with ognastys 'address' in it!
I may be wrong, but its not adding up.
He is looking for a person who is unexperienced in their dealings so when they slip up he will scam them for all their worth I bet.