Investing in BFL hardware doesn't seem any more risky than investing in BTC in the first place. It's a gamble. Don't put in more than you can stand to lose.
I have been watching BFL for sometime too. Never seen a website push back for so long. And the hashing power? Exactly why would they be selling it when they could make LITERALLY a fortune right now. This is going to be a see it to believe kinda thing for me my friend.