It is a good price...although, I have seen a huge variation in the hotness of Cinny's.
Here is some data for ya:
--- The following info found at www.SnakeMarket.com ---
2011 - Cinnamon - Male - $150 - [2012-06-19]
2011 - Cinnamon - Male - $300 - [2012-06-17]
2011 - Cinnamon - Male - $175 - [2012-06-14]
2011 - Cinnamon - Male - $250 - [2012-06-13]
2011 - Cinnamon - Male - $150 - [2012-06-12]
2011 - Cinnamon - Male - $225 - [2012-06-06]
--- Historical and Current Ball Python pricing data ---