I would say that it was worth the $50 to me personally. I expect to get quite a lot out of it, as I did and still do from Wii Sports and Wii Fit. But if you want a lower price, assuming you've got plans to buy more games on the near horizon, Amazon is running a deal where if you buy Wii Music before the 31st, you get $20 off another game purchase through them. Meaning that, between Wii Music and another game, you will have saved $20 and (if you wish to reason it this way) that Wii Music was the one that cost you $30.
Sky Render - Sanity is for the weak.