Volume 1 under/overestimates.

Sources used
http://myanimelist.net/forum/?topicid=737625
http://www.someanithing.com


Stalker estimation -> First week sales numbers


Underestimated(Went up by +20% or more).
*3.6k -> *9.1k Mekaku City Actors(Went up by +152%)
*1.2k -> *2.0k Escha & Logy no Atelier(Went up by +67%)[<2k sales]
15.6k -> 24.7k Haikyuu!!(Went up by +58%)[Series is popular among females[
*6.7k -> 10.3k Mahouka(Went up by +54%)[Amazon only edition, expected to be underestimated]
*0.6k -> *0.9k Seikoku no Dragonar(Went up by +50%)[<2k sales]
*5.7k -> *8.4k No Game No Life(Went up by +47%)
57.7k -> 82.1k Love Live 2nd season(Went up by +42%)
*4.5k -> *5.6k Date A Live II(Went up by +24%)
*6.6k -> *7.9k Gochiusa(Went up by +20%)
*5.5k -> *6.6k Kamigami no Asobi(Went up by +20%)








Overestimated(Dropped by 20% or more)


*0.6k -> *0.4k Soul Eater : NOT!(went down 50%)[<2k sales]
*4.8k -> *3.2k Wixoss(went down 50%)[Bd-box penalty was not applied, even though it should have been]
*1.3k -> *0.7k Inugami-san to Nekoyama-san(went down by 46%)[<2k sales]
*1.0k -> *0.6k Blade & Sou(went down by 40%)[<2k sales]
*2.3k -> *1.5k Daimidaler(went down by 35%)[<2k sales]
*3.0k -> *2.1k Captain Earth(went down by 30%)




Small difference between stalker estimation and the actual sales

*2.6k -> *3.1k Bokura wa Minna Kawaisou (went up by +19%)
*2.9k -> *3.5k Ping Pong(went up by +17%)
*2.8k -> *3.1k Puchimas!! Petit Petit iDOLM@STER(Went up by +11%)
11.0k -> 12.1k JoJo P3(Went up by +10%)
*4.3k -> *4.7k One Week Friends(Went up by +9%)
*2.8k -> *2.9k Black Bullet(Went up by +4%)
*1.9k -> *1.9k Brynhildr in the Darkness(no change)[<2k sales]
*6.4k -> *6.0k Sidonia no Kishi(went down by 6%)
*1.1k -> *1.0k Ryuugajou Nanana no Maizoukin(went down by 9%)[<2k sales]
*4.7k -> *4.1k Mushishi(went down by 13%)

Added the first 2 spring series.

2nd batch of spring shows added.

Time to add NGNL and Mekaku.

Added a bunch of series.

Added Wixoss and ping pong.