Hard copies are incredibly difficult to acquire for a decent price. Check eBay/craigslist often and you can grab it for under 20$. Amazon lists them at reasonable prices but all my orders eventually got canceled. 

You can always check out a copy at your library in the meantime! 

 Thanks. 
Here is the link of the talk from 2010
https://www.youtube.com/watch?v=lu_VqX6J93k&t=11