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Dr.Henry_Killinger said:
sc94597 said:

How did you determine this? We don't know the price elasticity of demand of either consumer-base, nor do we know anything about their demand curves really. 

We do know how long the consoles have been avaliable, at what prices, and how they have sold over time. Even if these two consoles hadn't already dropped before, which they have

So we can make a reasonable (ball park) guess.

Only if you assume the demand curve is linear, which is a poor assumption, as real world markets usually don't have linear demand curves. A $50 price drop from $400 to $350 is not going to have the same effect as a $50 price drop from $350 to $300 or $300 to $250. The following graph illustrates what a real-world demand curve might look like.