I got my CPW notification of the refurb price at $750 and I bought it, before I even realized that the price drop was in effect. I'm sure the refurbs will go lower eventually, on a 20% sale or something, but I don't want to wait. Everybody expected Canon to drop the price of this lens eventually. If they'd released it as a 6D kit lens in the US, the used prices would have been here already, although they're close now.
I just want to put my 28-105 back on my old film camera, and get my small-light standard zoom spot filled. The 24-105 IS STM rumor sounds interesting, but I'm tired of waiting. I expect I'd be able to sell the 24-70 for basically my purchase price in a year if need be.