It's not one issue. It says "from 2009 to 2010", and while it's not clear whether that represents one or two years, it's still quite a savings over buying back issues on paper, or even a subscription.

On a random tangent, having spent most of yesterday grokking the transition from a date to datetime on a subscription billing system, and the resulting implications to inclusiveness (ie. 1 day vs 1 second), I can say with no hint of irony that I truly appreciate the ambiguity of the phrase 2009-2010.

Oh! I take it back... good value!

You can read the first chapter of the Autumn 2010 edition free, from here https://kindle.amazon.com/work/2600-magazine-quarterly-digit... The maturity and tact of Goldstein's essay was so encouraging to me that I gladly paid $4 for that issue. $10 for a volume (four quarterly issues) seems totally reasonable to me.