Yea I think this is before the semi-annual sale either late Nov or early Dec... by the time Christmas hits a lot of the sizes are already gone. So don't bother to with the 15% since you'll not likely to find your size.
Thanks, guys. I've bought my SF BB shirts during the previous buy 4 get 40% off sales. I think that's already quite a good deal, so I'll do my purchases when that starts. Must remember to check this thread regularly again.