Steam Trading Card Set Pricer
This project creates overviews of Steam trading card prices. Data is parsed from the Steam Market. You can view the example here (it's not running anymore and is quite outdated).
It runs on Python (tested on 3.3) with no dependencies and generates the HTML in-place. It would probably run well on a dedicated server with a cron job.
The source hasn't been updated in a long time though, so it may need additional work to get running as Steam has updated their sites significantly recently.