Wii and DS generated the revenue and showed potential future revenue to justify those prices. It was never overvalued. Nintendo just did not keep it up.
Whether you think this was because Wii was a fad or that Nintendo screwed up is determined by your console alliegiance really. I wish it depended on evidence.
Apple's stock price depended on them exceeding future estimates by far, AND selling more units of frankly a luxury good to more people than would ever be part of the market in a downturn. It was overvalued and Apple could not have acted otherwise to improve the situation.







