I don't think adjusting stocks to match VGchartz.com is a very good idea. That would make this market's numbers no better than their estimates.
VGchartz is an imperfect and incomplete source. They have changed their numbers in the past and they are also missing games on their lists. I do use their numbers but they are still just estimates at best. Just beacuase a game doesn't appear on their site doesn't necessarily mean a game sold zero.
This is an example of a game VGchartz.com have missed but we have US NPD numbers for. 27,936 units sold in March and 13,415 in April for a total of 41,351 units sold.
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VGchartz is an imperfect and incomplete source. They have changed their numbers in the past and they are also missing games on their lists. I do use their numbers but they are still just estimates at best. Just beacuase a game doesn't appear on their site doesn't necessarily mean a game sold zero.
This is an example of a game VGchartz.com have missed but we have US NPD numbers for. 27,936 units sold in March and 13,415 in April for a total of 41,351 units sold.
http://ve3d.ign.com/articles/782/782126p1.html
http://ve3d.ign.com/articles/790/790122p1.html