True, good points. The GameCube did have a DVD-like optical drive though. And wouldn't a standard, "off-the-shelf" DVD drive cost less than Nintendo's custom, proprietary optical drive?
Also, how much did a network adapter cost in 2001? Enough to account for the $145 difference in production costs (sans hard drive)? It still doesn't add up to me.
(Keep in mind, I had bought an ethernet card for my computer in 2000 for $15, retail. How much could it have cost Microsoft in 2001, in bulk? $5 each?)
What the...?