Okay yeah, I just looked up the sales and between June and September the Angel series dropped from 131 best selling to 212 so I'm assuming that trend continued and the October sales were even worse.
Meanwhile Buffy has been consistently hitting around 150 during that same period, even peaking as high as 29th during May.
Even the Willow miniseries consistently performed the same if not better than the Buffy main series, Angel has been the weakest link in the franchise and getting progressively worse sales since the new writer was announced.