You are correct as I got the same response. We had brought this up a few podcasts ago and I have been running it for over a month now and it seems to be doing a great job although I paid $39 for it so you got a good deal. I have mine running real time and no impact on performance that I can see. I think this is a great solution, stable program and reasonably priced.
I see Dell has AVG® File Server Edition 2012 for $15.99 -- this is looking like a real possibility. Nice find!