After clicking the buy button in the USC, I don't get anything. Browsing to a couple of issues in the USC, I see that I've already downloaded them, but there isn't anything showing up when I search.
Where did Ubuntu Software Center install the issues on my system?
apt-cache policy software-center)? Can you provide a link to the piece of software you are trying to buy/install from here? – gertvdijk Dec 16 '12 at 17:43