part of the problem are the guys who buy in bulk just to resell them. On my local CL, there's a guy selling 10+ 40 pancakes, for $120 and listed them all as refurbs.
I grabbed a 24-70 v1 last October and an MP-E 65 last week with the help of canonpricewatch.com. I've had the chance to buy a variety of other lenses as well but didn't (100-400, 70-200 2.8, 85L, 100L, 135L). I think you just need to check very often and also have a bit of luck.
Sucks regarding the 40. It would've been nice to pick up one for cheap.