A couple of introductory in-game videos to give you a feel for it. They're about 15 minute chunks or so of the beginning of the game. This whole series is good. The guy doing the voiceover has a decent voice, finally. He also doesn't hold punches, he mentions bugs when they come up. You guys really should look into signing up. I have little doubt I can get you into my league (assuming you're willing to run with Vent).
Yeah, it is a bit of an investment, to be sure. Personally, I think it's worth it, but I can understand that some people can't afford it. Probably why most of the people playing it (that I know) are at least mid-20s, post-college.