A lot of idiots selling at or below that price are scammers. There might be one or two rare sellers but i have been scammed by btclegonaire (an account owned by anonymous22). You can read more on my scam thread. Anyway always go with a very trusted escrow who is not brain dead.
yes a lot of newbies selling keys and scamming peoples here
thats why i say that i will prefer to use escrow or seller go first
it will much better if i can find a trusted and reputated seller