I looked at the completed listings on ebay.ca and a brand new sealed copy of Twilight Princess sold for $23.49 Canadian $6.13 shipping a week ago (and the seller had a 100% feedback rating and has the power seller badge).
If you need anymore indication that Nintendo's non-evergreen games are overpriced at retail, look no further than that. There is no reason to buy that game for $50/$60 in retail right now when you can find it for a lot less on eBay (this is why I love eBay. eBay acts like a market correction. I bought several brand new sealed copies of games from eBay and Amazon Marketplace for lower than retail rates. Though the Black Friday and Boxing Day sales at retail are very solid at times and better than what you can get on eBay). Zelda has the critical reception and respect. But it is not evergreen like a Mario Kart, NSMB, Wii Fit, etc.
And yeah the Fire Emblem situation is unfortunate. Nintendo isn't making any money off it anymore since it's out of print. But if they re-released it for $30 at retail as part of Players Choice, the game would get a good boost.