Buffy the Vampire Slayer Season 10 #11
Christos Gage (W), Nicholas Brendon (W), Megan Levens (A), Dan Jackson (C), Steve Morris (Cover), Rebekah Isaacs (Variant cover), and Georges Jeanty and Tariq Hassan (Birthday variant cover)
On sale Jan 21
FC, 32 pages
$3.50
Ongoing
With the magical side of things momentarily under control, Buffy and crew have a chance to deal with their personal lives: things heat up between Xander and Dawn, young Giles is visited by an old flame, Andrew introduces some new friends, and the Slayer is totally set for round one of speed dating! Then the bad guy shows up.
• Secrets are revealed!
• Buffy celebrates her birthday this month with a special cover by Georges Jeanty!
Source: http://www.comicbookresources.com/?page=article&id=56302
I'm afraid sales started dropping long before Spike was even in the comics let alone on the covers.