According to the Canon sales rep I spoke with, and her supervisor, and the rep who emailed me, they don't sell that lens refurbished any more. The page you are accessing is a cached page. So there is no question of it being in stock, it is simply not for sale. Quite disappointing.
However, you may want to confirm this for yourself. Good luck!
Yep. I can't confirm it's gone from refurb forever, but it's not on the main refurb lens page as of the beginning of the sale. That cached page that CPW points to still exists but now formally says out of stock.
It's a little surprising, b/c many are in the wild and it sells out instantly when offered. This isn't a $10k supertele that they get one of per year that can sit for some time without getting sold.
But I think it will be back. The 24 1.4L, 35 1.4L and others drop off the refurb site completely (i.e. not listed as out of stock -- the item just drops from the store) as they restock.
Hope you are right.
I really want this lens, and my biggest reason for that is the size. I need something light in the 100-150 range that I often need. Of course, I could go for a cheaper zoom (70-300 non-L or Tamron) but I've owned those previously and it is hard to go back to that kind of IQ.
Now, if I owned the 70-300L that would be a very different question. So I wouldn't look at the 135L for it's new price (even with the rebate) because then getting a used or refurb 70-300L is better for me.