It presents well, is a well balanced design and is simply a beautiful coin, especially if you like dogs. It was also very innovative in 2006.
Issue was $90 plus tax, 10 years ago so $100 today isn't exactly tearing it up. Many dealers and
ebay listing are asking closer to $175-200.
The other two $30 coins from 2006, the War Memorial and Beaumont Hamel also held their value for the most part over the years. Could be a function of the limited number of coins produced annually even just 10 years.
Actual mintage of the dog sled was only 7384 of 15000 proposed so it did not sell very well back then yet it still was reasonably plentiful at least by today's standards.