NewEgg has it for $1569, and had it for $1449 last week. That's the best price I could find (I looked all over the net).
I just bought this lens last week (I've had it for six days) for $1499, no tax and no shipping from Beach Camera.
So, yes, the price jumped almost 200 bucks. However, keep your eyes peeled. It'll come back down. Just give it time.
Part of the problem, in my stumble opinion, is that the Christmas season is underway. Oh, they don't have the decorations up yet, but right after Halloween you'll see it creeping in. They act as if it starts after Thanksgiving, but that's old school.
It's on, baby. It's on, so you you'll have to watch it like a hawk.
Keep in mind that some companies offer ten percent for this and that. See if that will work.
The best thing is to just wait it out. They won't continue to go up beyond the $1667 MSRP that Canon suggests. They can only go down.
Thank you. 